JP2004528334A - New compounds - Google Patents

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JP2004528334A
JP2004528334A JP2002583393A JP2002583393A JP2004528334A JP 2004528334 A JP2004528334 A JP 2004528334A JP 2002583393 A JP2002583393 A JP 2002583393A JP 2002583393 A JP2002583393 A JP 2002583393A JP 2004528334 A JP2004528334 A JP 2004528334A
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alkyl
mmol
methyl
group
cyclopropylmethyl
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JP2004528334A5 (en
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ユン−シン・チェン
ミロスラウ・トーマシェウスキ
クリストファー・ウォールポール
フア・ヤン
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AstraZeneca AB
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Abstract

一般式(I)の化合物並びにその塩、新しい化合物を含有する医薬組成物および治療、特に疼痛処理におけるその使用を開示し、本出願により特許請求する。The compounds of general formula (I) and salts thereof, pharmaceutical compositions containing the new compounds and their use in therapy, especially in the treatment of pain, are disclosed and claimed by the present application.

Description

【技術分野】
【0001】
本発明はCB2受容体においてアゴニストとなる新しい化合物およびその塩に関する。化合物は治療、特に疼痛の治療において有用である。本発明はまた新しい化合物の製造方法、それらを含有する医薬組成物、および治療、特に疼痛の治療における化合物の使用に関する。
【背景技術】
【0002】
2種のカンナビノイド受容体が知られており、一方は中枢神経系で主に発現し(CB1)、もう一方は末梢部に存在し、免疫系に由来する細胞および組織に主に限定されている(CB2)(Abood and Martin Int. Rev. of Naurobio. 39, 197-211, (1996))。
【0003】
CB1受容体におけるアゴニストおよび混合アゴニストは動物における抗侵害受容モデルにおいて高度に有効であるが、どの程度まで望ましくないCNS副作用から所望の鎮痛作用を分離できるかは解かっていない。これらの望ましくないCNS副作用はCB1受容体により媒介されることが知られている。
【0004】
多くの報告が病理生理学的に重要なCB2の役割を指摘している。特にMunro等[Nature, 365, 61-64(1993)]はCB2受容体の発現は免疫細胞活性化の条件下に誘発されることを発見している。Hanus等[PNAS 96, 14228-14223(1999)]は最近CB2アゴニストが抗炎症活性および末梢鎮痛活性を示す証拠を提示した。更にまた、Mazzari等[Soc. Neurosci. Abstr. 23, 652(1995)]はCB2活性化により神経傷害に伴う機械的痛覚過敏が抑制されることを報告している。これらの結果は、CB2受容体が従来のカンナビノイドアゴニスト、例えばテトラヒドロカンナビノール(THC)に伴っていたCB1媒介副作用を排除することが期待される新しい鎮痛剤の発見のための興味深い標的であることを示している。更にまた、CB2受容体は末梢部に限局しているため、選択的CB2アゴニストは、中枢作用性のカンナビ摸倣(CB1)またはアヘン系の薬剤の精神活性の副作用および一般に知られている乱用の危険性を伴うことなく疼痛を低減することが期待される。
【0005】
従来技術において発見され存在している鎮痛剤は全身投与時の不良な薬物動態および鎮痛活性の損失を含む多くの難点を有している。
【発明の開示】
【0006】
本発明の化合物は下記式I:
【化1】

Figure 2004528334
[式中、R1は −(C1−C8)アルキル、−(C2−C8)アルケニル、R4 2N(C1−C6)アルキル−、R4 2NC(=O)(C1−C6)アルキル−、R4O(C1−C6)アルキル−、R4OC(=O)(C1−C6)アルキル−、R4C(=O)(C1−C6)アルキル−、R4C(=O)NR4(C1−C6)アルキル−、R4 2NSO2(C1−C6)アルキル−、R4CSO2NR4(C1−C6)アルキル−、R4 2NC(=O)NR4(C1−C6)アルキル−、R4 2NSO2NR4(C1−C6)アルキル−、アリール(C1−C6)アルキル、アロイル(C1−C6)アルキル、ヘテロアリール(C1−C6)アルキル、ヘテロアロイル(C1−C6)アルキル、ヘテロシクロアルキル(C1−C6)アルキル、2環式ヘテロアリール(C1−C6)アルキルおよび2環式ヘテロアロイル(C1−C6)アルキルよりなる群から選択され;
1部分は未置換の−(C2−C8)アルケニルおよび未置換であるかハロゲン、シアノ、アセトキシメチルおよびニトロよりなる群から独立して選択される部分1またはそれ以上で置換された−(C1−C8)アルキルを包含し;
Arは場合により置換されたアリール部分であり;
2は未置換であるかまたはフッ素置換基1またはそれ以上で(1〜6炭素上で)置換された−(C1−C6)アルキル、または、(C3−C6)シクロアルキルであり;
【0007】
3は下記:
【化2】
Figure 2004528334
よりなる群から選択される部分であり;
【0008】
4は−H、−(C1−C6)アルキル、−(C2−C6)アルケニルおよび−(C2−C6)アルキニルよりなる群から独立して選択される部分であり;
NR4 2はNR4 2が複素環系を、例えばピロール、ピペリジン、ピペラジンまたはピロリジノンを形成する化合物を包含し;
5部分は−H、−(C1−C6)アルキル、−(C2−C6)アルケニルおよび−ヘテロサイクリルよりなる群から独立して選択され;
NR5 2はNR5 2が複素環系を、例えばピロール、ピペリジン、ピペラジンまたはピロリジノンを形成する化合物を包含し;
6部分は−H、−(C1−C6)アルキル、−(C2−C6)アルケニルおよび−(C1−C6)アルカノイル、ヘテロサイクリル、ヘテロサイクリル(C1−C3)アルキル、アリール、アリール(C1−C3)アルキル、ヘテロアリール、ヘテロアリール(C1−C3)アルキル、2環式ヘテロアリールおよび2環式ヘテロアリール(C1−C3)アルキル、よりなる群から独立して選択され;
5およびR6は一緒になって5〜7員の複素環、例えばピロール、ピペリジン、ピペラジン、ピロリジノン、ホモピペラジンまたはヘキサメチレンイミンを形成し;
Xは−C(R5)2−、−NR5−、C(=O)−、−CH2−CH2−、−CH=CH−、−O−、−C(R)(R')−および−S(O)n−(式中n=0、1または2)よりなる群から選択され、ただしRおよびR'=(C1−C6)アルキル、OR”またはHであり、そしてR”=Hまたは(C1−C6)アルキルであり;そして、
YはCまたはNである]の化合物および製薬上許容しうるその塩、およびジアステレオマーおよびエナンチオマーおよびその混合物として定義される。
【0009】
アルキルという用語は本明細書においては、直鎖、分子鎖および環状の置換基、例えば、メチル、エチル、n−プロピル、イソプロピル、n−ブチル、イソブチル、t−ブチル、シクロプロピルメチルおよびシクロペンチルを包含し、アルキル鎖上の部分はアミノ(C1−C6)アルキルが1−アミノプロピルおよび2−アミノプロピルを包含するように鎖上の如何なる場所に存在してもよい。
【0010】
ハロゲンという用語は本明細書においては、フッ素、塩素、臭素およびヨウ素を包含する。
【0011】
アリール部分という用語は芳香族炭素環、5員複素芳香族環系、6員複素芳香族環系および2環式の複素芳香族環系を包含する。
【0012】
芳香族炭素環にはフェニルおよびナフチルが包含される。
【0013】
5員の複素芳香族環系は環原子の1、2または3個がN、OおよびSから独立して選択される環原子5個を有する単環の芳香族環系である。
【0014】
好ましくは5員の複素芳香族環系はチエニル、フリル、ピロリル、イミダゾリル、チアゾリル、オキサゾリル、ピラゾリル、イソチアゾリル、イソキサゾリル、1,2,3−トリアゾリル、テトラゾリル、1,2,3−チアジアゾリル、1,2,3−オキサジアゾリル、1,2,4−トリアゾリル、1,2,4−チアジアゾリル、1,2,4−オキサジアゾリル、1,3,4−トリアゾリル、1,3,4−チアジアゾリルおよび1,3,4−オキサジアゾリルよりなる群から選択される。
【0015】
6員の複素芳香族環系は環原子の1、2または3個がNである環原子6個を有する単環の芳香族環系である。
【0016】
好ましくは6員の複素芳香族環系はピリジル、ピラジニル、ピリミジニル、トリアジニルおよびピリダジニルよりなる群から選択される。
【0017】
2環式の複素芳香族環系は、環縮合により連結された、5員または6員の複素芳香族環2個、または、フェニルと5員または6員の複素芳香族環1個、または、フェニルと複素環、または、5員または6員の複素芳香族環と複素環を有する環系であり;該2環式複素芳香族環系は、環原子の1、2または3個がN、OおよびSから独立して選択される環原子8〜12個を含む。
【0018】
2環式の複素芳香族環系は好ましくはインドール、インドリン、キノリン、テトラヒドロキノリン、イソキノイン、テトラヒドロイソキノリン、1,4−ベンゾジオキサン、クマリン、ジヒドロクマリン、ベンゾフラン、2,3−ジヒドロベンゾフラン、1,2−ベンズイソキサゾール、ベンゾチオフェン、ベンゾキサゾール、ベンズチアゾール、ベンズイミダゾール、ベンゾトリアゾール、ピロリジンおよびキノリジジンよりなる群から選択される。
【0019】
ヘテロサイクリルまたは複素環部分は、環原子の1、2または3個がN、OおよびSから独立して選択される環原子3〜7個を有する飽和または部分飽和の環系である。
【0020】
ヘテロサイクリル部分は好ましくはアジリジン、オキシラン、チイラン、アゼチジン、オキセタン、チエタン、ピロリジン、ピロリン、イミダゾリジン、ピラゾリジン、ジオキソラン、スルフォラン、2,3−ジヒドロフラニル、2,5−ジヒドロフラニル、テトラヒドロフラニル、チオファニル、ピペリジン、ピペラジン、モルホリン、2,3−ジヒドロピラニル、テトラヒドロピラニル、1,4−ジヒドロピリジニル、1,4−ジオキサニル、1,3−ジオキサニル、ジオキサニル、ホモピペリジニル、ホモピペラジニル、1,3−ジオキセパン、4,7−ジヒドロ−1,3−ジオキセピンおよびヘキサメチレンオキシドよりなる群から選択される。
【0021】
芳香族、複素芳香族、ヘテロサイクリルおよび2環式の複素芳香族部分は、未置換であるか、好ましくはハロゲン、トリフルオロメチル、シアノ、ニトロ、ヒドロキシ、−NR4 2−、−C(=O)OR4、−C(=O)R4、−C(=O)NR4 2、−NR4C(=O)R4、−(C1−C6)アルキル、−(C2−C6)アルケニル、−OR4、−SR4、−SO24、オキソ(=O)、イミノ(=NR4)、チオ(=S)およびオキシイミノ(=N−OR4)よりなる群から独立して選択される部分により環炭素上で置換されている。
【0022】
5員の複素芳香族、ヘテロサイクリルまたは2環式の複素芳香族環系の環窒素原子は未置換であるか、または、置換が該環窒素の4級化を伴うことなく化学的に可能である場合は、好ましくは−(C1−C6)アルキルおよび−C(=O)R4よりなる群から独立して選択される部分で置換されている。
【0023】
置換基−(C1−C6)アルキル、−(C2−C6)アルケニルおよび−(C1−C6)アルカノイルは未置換であるか、または、ハロゲン、ヒドロキシ、−OR4、−NR4 2よりなる群から独立して選択される部分により1またはそれ以上の炭素上において置換されている。
【0024】
本発明の化合物がキラル中心1またはそれ以上を有する場合は、本発明の化合物はエナンチオマーまたはジアステレオマーの形態として、またはラセミ混合物として、存在し、単離してよい。本発明はCB2アゴニストとして作用する式Iの化合物の如何なる可能なエナンチオマー、ジアステレオマー、ラセミ体、またはこれらの混合物も包含する。光学活性型の合成は当該分野でよく知られた有機化学の標準的な方法、例えば、ラセミ体のキラルクロマトグラフィー分離、光学活性出発物質からの合成、または不斉合成により行なってよい。
【0025】
本発明の特定の化合物は幾何異性体、例えばアルケンのEおよびZ型異性体として存在してよい。本発明はCB2アゴニストとして作用する式Iの化合物の如何なる幾何異性体をも包含する。本発明は式Iの化合物の互変異性体も包含するものとする。
【0026】
本発明の特定の化合物は溶媒和型、例えば水和型、並びに未溶媒和型として存在してよい。本発明はCB2アゴニストとして作用する式Iの化合物のこのような溶媒和型の全てを包含するものとする。
【0027】
式Iの好ましい実施態様において、R1がR4 2N(C1−C6)アルキルであり、ここで両方のR4が(C1−C6)アルキルである場合は、R3は(上記した)部分(a)、(c)、(d)、(e)、(f)、(g)、(h)および(k)および場合により(b)および(i)(ただしR6が−(C1−C6)アルキル(特にメチル、例えばR3がアセチルまたはアセトアミドである)場合を除く)および(j)(R5が共にHである、例えばR3が第1アミンである場合を除く)から選択される。
【0028】
本発明の好ましい化合物は、R1が−(C1−C8)アルキル、−(C2−C8)アルケニル、アリール(C1−C6)アルキル−、R4 2N(C1−C6)アルキル−、R4O(C1−C6)アルキル−、−ヘテロシクロアルキル(C1−C6)アルキル−(4〜8員)およびヘテロアリール(C1−C6)アルキルよりなる群から選択され;
ここでアリールおよびヘテロアリールのR1部分は未置換であるか、または−(C1−C6)アルキル、アセトキシメチルまたはハロゲンで置換されており;
2は−CH3、−CH2CH3、−CH(CH3)2、(C3−C5)シクロアルキルおよびCF3よりなる群から選択され;
【0029】
3は下記:
【化3】
Figure 2004528334
よりなる群から選択され;
【0030】
Arはアリール部分であり;未置換であるか、(C1−C6)アルキル、ハロゲン、トリフルオロメチル、シアノ、ニトロ、ヒドロキシおよび−OR4よりなる群から独立して選択される部分1またはそれ以上で置換されており;
Xは−CH2−、−CH2CH2−、−C(=O)−、−S−、−O−、−C(R)(R')−および−N(R)−よりなる群から選択され、ここでRおよびR'=(C1−C6)アルキル、OR”またはHであり、R”=Hまたは(C1−C6)アルキルであり;
Arがフェニルまたは6員の複素芳香族環系である場合、Xは環Ar上で−O−R2基に関して1,4の位置関係にあり;
Arが5員の複素芳香族環系である場合、Xは環Ar上で−O−R2基に関して1,3の位置関係にあり;
4は−Hおよび−(C1−C6)アルキルよりなる群から独立して選択され;
5は−H、−(C1−C6)アルキルおよび−(C2−C6)アルケニルよりなる群から独立して選択され;そして、
6は−H、−(C1−C6)アルキルおよび−(C2−C6)アルケニルおよびヘテロアリールよりなる群から独立して選択され;
ここで該ヘテロアリールは未置換であるか、または−(C1−C6)アルキルにより置換されている式Iの化合物である。
【0031】
より好ましい本発明の化合物は、R1がシクロプロピルメチル、エチル、プロピル、アリル、イソペンチル、ベンジル、メトキシエチル、ジメチルアミノエチル、4−ピリジルメチル、2−ピリジルメチル、1−ピロリルエチル、1−モルホリノエチル、シクロヘキシルメチル、2−ピロリジルメチル、N−メチル−2−ピロリジルメチル、2−ピペリジルメチル、N−メチル−2−ピペリジルメチル、3−チエニルメチル、2−テトラヒドロフラニルメチル、(2−ニトロチオフェン−5−イル)メチル、(1−メチル−1H−イミダゾール−2−イル)メチル、(5−(アセトキシメチル)−2−フラニル)メチル、(2,3−ジヒドロ−1H−イソインドール−1−イル)メチルおよび5−(2−メチルチアゾリル)よりなる群から選択され;
2は−CH3、−CH2CH3、−CH(CH3)2およびCF3よりなる群から選択され;
4は−(C1−C6)アルキルであり;
5は−H、−CH3、−CH2CH3、−CH=CH2および−CH2−CH=CH2よりなる群から独立して選択され;そして、
6は−CH3、−CH2CH3、−CH=CH2、−CH2−CH=CH2、−CH2−CH2−CH=CH2、−CH2CH(CH3)2および5−メチル−3−イソキサゾールよりなる群から独立して選択され;
Arはフェニルまたは6員の複素芳香族環系であり、その何れも未置換であるか、(C1−C6)アルキル、ハロゲン、トリフルオロメチル、シアノ、ニトロ、ヒドロキシおよび−OR4よりなる群から独立して選択される部分1またはそれ以上で置換されており;
Xは−CH2−、−CH2CH2−、−S−、−O−、−C(=O)−、−C(R)(R')−および−N(R)−よりなる群から選択され、ここでRおよびR’=(C1−C6)アルキル、OR”またはHであり、R”=Hまたは(C1−C6)アルキルであり;そして、
Xは環Ar上で−O−R2基に関して1,4の位置関係にある式Iの化合物である。
【0032】
最も好ましい本発明の化合物は、R2が−CH2CH3であり;
Arは未置換のフェニルまたはピリジルであり;
Xは−CH2−、−CH2CH2−、−S−、−O−、−C(R)(R')−および−N(R)−よりなる群から選択され、ここでRおよびR’=(C1−C6)アルキル、OR”またはHであり、R”=Hまたは(C1−C6)アルキルであり;そして、
Xは環Ar上で−O−R2基に関して1,4の位置関係にあり;そして、
4はメチルである式Iの化合物である。
【0033】
特定の好ましい化合物において、Xは−CH(CH3)−、−C(CH3)2−、−CH(OH)−、−NH−および−N(CH3)−よりなる群から選択され;最も好ましくは−CH(CH3)−である。
【0034】
本発明者等は今回、本発明の化合物はCB2受容体部位において選択的な活性を示し、そして、疼痛、特に慢性疼痛、例えば慢性炎症性疼痛、神経障害性疼痛、背部疼痛、癌性疼痛および内臓疼痛の緩解において有用である。本発明の化合物はまた急性の疼痛の治療においても有用であろう。更にまた、本発明の化合物はCB2受容体の変性または機能不全が存在するか関与している他の疾患状態においても有用である。
【0035】
本発明の範囲には式Iの化合物の塩も包含される。一般的に本発明の化合物の製薬上許容しうる塩は当該分野でよく知られた標準的な操作法により、例えば、十分塩基性の化合物、例えばアルキルアミンを適当な酸、例えば塩酸または酢酸と反応させることにより生理学的に許容されるアニオンを形成することにより得てよい。また、適当な酸性のプロトン、例えばカルボン酸またはフェノールを有する本発明の化合物を、アルカリ金属またはアルカリ土類金属の水酸化物またはアルコキシド(例えばエトキシドまたはメトキシド)
または適当な塩基性の有機アミン(例えばコリンまたはメグルミン)1等量で、水性溶媒中で処理し、その後、従来の精製操作を行なうことにより相当するアルカリ金属(例えばナトリウム、カリウムまたはリチウム)またはアルカリ土類金属(例えばカルシウム)の塩を調製する事もできる。
【0036】
更にまた治療における本発明の化合物の使用も本発明に包含される。
【0037】
本発明の新しい化合物は治療において、特に種々の疼痛症状、これらに限定されないが例えば急性疼痛、慢性疼痛、神経障害性疼痛、急性疼痛、背部疼痛、ガン性疼痛および内臓疼痛の治療において有用である。
【0038】
ヒトのような温血動物における治療のために使用する場合は、CB2アゴニストは一般的に従来の医薬組成物の形態で投与され、一般的に組成物は経口または舌下投与に適する形態、例えば錠剤またはカプセル、または、非経腸注射(例えば静脈内、皮下、筋肉内、血管内または注入)用、例えば滅菌溶液、懸濁液または乳液、局所投与用、例えば軟膏またはクリーム、または直腸投与用、例えば坐剤である。一般的に、上記した組成物は従来の担体を用いて従来の方法で調製してよい。本発明の組成物は単位剤型で好都合に提供される。
【0039】
本発明を実施する際の治療有効量は患者個体の年齢、体重および応答を含む知られた基準を用いて決定してよく、そして、治療すべき、または予防すべき疾患の範囲内で当業者が解釈してよい。
【0040】
疼痛の治療のための医薬の製造のための上記式Iの如何なる化合物の使用も本発明に包含される。
【0041】
更に提供されるものは種々の疼痛症状、これらに限定されないが例えば急性疼痛、慢性疼痛、神経障害性疼痛、急性疼痛、背部疼痛、ガン性疼痛および内臓疼痛の治療のための医薬の製造のための式Iの何れかの化合物の使用である。
【0042】
本発明の別の特徴は上記した症状の何れかに罹患した対象の治療のための方法であり、その際、上記式Iの化合物の有効量を該治療の必要な患者に投与する。更にまた、式Iの化合物または製薬上許容しうるその塩を製薬上許容しうる担体ともに含有する医薬組成物も提供される。
【0043】
特に、治療のため、特に疼痛の治療のための、式Iの化合物または製薬上許容しうるその塩を製薬上許容しうる担体と共に含有する医薬組成物が提供される。
【0044】
更にまた、上記した症状の何れかにおける、式Iの化合物または製薬上許容しうるその塩を製薬上許容しうる担体と共に含有する医薬組成物が提供される。治療という用語は本発明の範囲においては、本発明の既存の疾患状態、優性または慢性または再発性の症状を緩和するために本発明の化合物の有効量を投与することを意味する。この定義はまた、再発性の症状の防止のための予防的治療および慢性障害の持続的治療を包含する。
【0045】
〔医薬組成物〕
本発明の新しい化合物は経口、舌下、筋肉内、皮下、局所、鼻内、腹腔内、胸腔内、静脈内、硬膜外、硬膜下腔内、脳室内および関節内注射により投与してよい。
【0046】
好ましい投与経路は、経口、静脈内または筋肉内である。
【0047】
用量は、投与経路、疾患の重症度、患者の年齢および体重、および、特定の患者にとって最も適切であるものとして個々の用法および用量水準を決定する際に担当医師が通常考慮する他の要因により変化する。
【0048】
本発明の化合物から医薬組成物を製造するためには、不活性の製薬上許容しうる担体は固体または液体であることができる。固体形態の製剤は粉剤、錠剤、分散性顆粒、カプセル、カシェ剤および坐剤を包含する。
【0049】
固体担体は希釈剤、フレーバー剤、可溶化剤、潤滑剤、懸濁剤、バインダーまたは錠剤崩壊剤としても機能する1種またはそれ以上の物質であることができ;これはまたカプセル化剤であることもできる。
【0050】
粉剤の場合、担体は微粉砕活性成分との混合物における微粉砕固体である。
錠剤の場合、活性成分は、必要な結合特性を有する担体と適当な比率で混合し、所望の形状および大きさに圧縮成形する。
【0051】
坐剤の製造のためには、低融点ワックス、例えば脂肪酸グリセリドまたはカカオバターの混合物をまず溶融し、その中に活性成分を攪拌などにより分散させる。次に溶融した均質な混合物を好都合な大きさの鋳型に注入し、冷却し、固化させる。
【0052】
適当な担体は炭酸マグネシウム、ステアリン酸マグネシウム、タルク、乳糖、糖、ペクチン、デキストリン、澱粉、トラガカント、メチルセルロース、カルボキシメチルセルロースナトリウム、低融点ワックス、カカオバター等である。
【0053】
塩は例えばこれに限らないが、製薬上許容しうる塩である。本発明の範囲に包含される製薬上許容しうる塩の例は、酢酸塩、ベンゼンスルホン酸塩、安息香酸塩、重炭酸塩、重酒石酸塩、炭酸塩、クエン酸塩、フマル酸塩、グルコン酸塩、グルタミン酸塩、臭化水素酸塩、塩酸塩、乳酸塩、マレイン酸塩、マンデル酸塩、メシレート、リン酸塩/二リン酸塩、サリチル酸塩、コハク酸塩、硫酸塩、酒石酸塩、並びにコリン、ジエタノールアミン、エチレンジアミン、メグルミン、アルミニウム、カルシウム、マグネシウム、カリウム、ナトリウム、および亜鉛の塩を包含する。
【0054】
本発明の範囲に含まれる製薬上許容し得ない塩の例には、ヨウ化水素酸塩、過塩素酸塩、テトラフルオロホウ酸塩、リチウムの塩が包含される。
【0055】
好ましい製薬上許容しうる塩は塩酸塩、硫酸塩および重酒石酸塩である。
【0056】
塩酸塩および硫酸塩が特に好ましい。
【0057】
組成物という用語は、(その他の担体を伴うか伴うことなく)活性成分がそれと組み合わせられる担体により包囲されているようなカプセルを与える担体としてカプセル化剤を用いた活性化合物の製剤を包含する。同様にカシェ剤も包含される。
【0058】
錠剤、粉剤、カシェ剤およびカプセルを経口投与に適する固体剤型として使用できる。
【0059】
液体製剤は溶液、懸濁液および乳液を包含する。活性化合物の滅菌水または水−プロピレングリコール溶液が非経口投与に適する液体製剤として挙げられる。液体組成物はまたポリエチレングリコールの水溶液中の溶液としても製剤できる。
【0060】
経口投与に適する水溶液は、活性成分を水に溶解し、適当な着色料、フレーバー剤、安定化剤、および増粘剤を所望のとおり添加することにより製造できる。経口使用に適する水性懸濁液は、粘稠な物質、例えば、天然ガムまたは合成ガム、樹脂、メチルセルロース、カルボキシメチルセルロースナトリウムおよび他の医薬組成物技術においてよく知られた懸濁剤と共に微粉砕活性成分を水中に分散させることにより製造できる。
【0061】
好ましくは医薬組成物は単位剤型である。このような形態において、組成物は活性成分の適切な量を含有する単位用量に分割される。単位剤型はパッケージされた製剤、異なる量の製剤の入ったパッケージ、例えば、パック入り錠剤、カプセル、および、バイアルまたはアンプル入りの粉剤であることができる。更にまた、単位剤型は、カプセル、カシェ剤または錠剤そのものであることもでき、あるいは、パッケージされた形態の上記何れかの適切な数量であることができる。
【0062】
〔製造方法〕
方法A1
下記式I:
【化4】
Figure 2004528334
の化合物の製造のための方法A1は、下記工程を包含する。即ち:
【0063】
下記式II:
【化5】
Figure 2004528334
[式中R1、R3およびYは式Iの場合と同様に定義される]の化合物を下記式III:
【0064】
【化6】
Figure 2004528334
[式中R2、ArおよびXは式Iの場合と同様に定義され、Lは−OHまたは脱離基、例えばハロゲン化物、O−トシルまたはO−メシルである]の化合物と反応させる。この反応は20分間周囲温度でトルエンのような不活性溶媒中で行なうのが好都合である。その後、触媒量の濃塩酸を添加し、混合物を85℃12時間加熱する。後処理は水抽出により行ない、生成物の精製は正相または逆相クロマトグラフィーにより行なう。
【0065】
方法A2
式IIの化合物の製造のための方法A2は下記工程を包含する。即ち:
下記式IV:
【化7】
Figure 2004528334
[式中R1、R3およびYは式Iの場合と同様に定義される]の化合物を10〜50ポンド/平方インチの圧力下水素と反応させることにより相当するアニリン(式II)に還元することができる。この反応は周囲温度でエタノール、メタノールまたはテトラヒドロフランのような不活性溶媒中で行なうのが好都合である。反応は遷移金属触媒、好都合には微細分割炭素上5〜10%パラジウムにより触媒される。
【0066】
方法A3
式IVの化合物の製造のための方法A3は下記工程を包含する。即ち:
下記式V:
【化8】
Figure 2004528334
[式中R1、R3およびYは式Iの場合と同様に定義される]の化合物を第1アミンと反応させる。この反応は50〜100℃の温度で80%エタノールのようなプロトン性溶媒中で行うのが好都合である。後処理は好都合には水抽出により行ない、精製は正相クロマトグラフィーにより好都合に行なわれる。
【0067】
方法A4
式IIIの化合物の製造のための方法A4は下記工程を包含する。即ち:
下記式VI:
【化9】
Figure 2004528334
[式中R2、ArおよびXは式Iの場合と同様に定義され、Lは−OHまたは脱離基、例えばハロゲン化物、O−トシルまたはO−メシルである]の化合物をチオニルクロリドのようなハロゲン化剤と反応させる。この反応は25〜100℃の温度でベンゼンまたはトルエンのような不活性溶媒中で行うのが好都合である。後処理は減圧下に溶媒を除去することにより好都合に行なわれ、精製は蒸留により好都合に行なわれる。
【0068】
方法A5
式VIIIの化合物の製造のための方法A5は下記工程を包含する。即ち:
(工程A1により製造された)下記式VII:
【化10】
Figure 2004528334
[式中R1、R2、Ar、XおよびYは式Iの場合と同様に定義され上記した一般的方法により製造される]の化合物をKOHを用いて加水分解する。この反応は還流温度で1:1エタノール/水のような水性溶媒混合物中で好都合に行なわれる。中和後、冷却された反応混合物を濾過することにより生成物が好都合に単離される。
【0069】
方法A6
或いは、式VIIIの化合物の製造のための方法A6は下記工程を包含する。即ち:
(工程A1により製造された)下記式X:
【化11】
Figure 2004528334
[式中R1、R2、Ar、XおよびYは式Iの場合と同様に定義され上記した一般的方法により製造される]の化合物を水酸化ナトリウムのような水性塩基を用いてエステルXを加水分解して相当するカルボン酸とすることにより、相当するカルボン酸VIIIに変換する。
【0070】
方法A7
式IXの化合物の製造のための方法A7は下記工程を包含する。即ち:
下記式VIII:
【化12】
Figure 2004528334
[式中R1、R2、Ar、XおよびYは式Iの場合と同様に定義され上記した一般的方法により製造される]の化合物をHATU[O−(7−アザベンゾトリアゾール−1−イル)−N,N,N',N'−テトラメチルウロニウムヘキサフルオロホスフェート]、HBTU[O−ベンゾトリアゾール−1−イル)−N,N,N',N'−テトラメチルウロニウムヘキサフルオロホスフェート]またはTBTU[O−(1H−ベンゾトリアゾール−1−イル)−N,N,N',N'−ペンタメチレン−ウロニウムテトラフルオロボレート]のような酸活性化剤の存在下第1または第2アミンと反応させることにより相当するアミドに変換する。反応は酸スカベンジャ−として機能するトリエチルアミンまたはジイソプロピルエチルアミンのような第3アミンを用いて周囲温度でDMFのような極性非プロトン性の溶媒中で好都合に行なわれる。生成物は水抽出により好都合に単離され、正相クロマトグラフィーにより精製される。
【0071】
方法A8
式XIの化合物の製造のための方法A8は下記工程を包含する。即ち:
(工程A1またはA7により製造された)下記式IX:
【化13】
Figure 2004528334
[式中R1、R2、R6、Ar、XおよびYは式Iの場合と同様に定義され上記した一般的方法により製造される]の化合物をP25と反応させることにより相当するチオアミド(式XI)に変換する。反応は100℃の温度でピリジン中好都合に行なわれる。生成物は反応混合物のデカントの水抽出により好都合に単離され、正相クロマトグラフィーにより精製される。
【0072】
方法A9
式XIIの化合物の製造のための方法A9は下記工程を包含する。即ち:
(工程A1により製造された)下記式VII:
【化14】
Figure 2004528334
[式中R1、R2、Ar、XおよびYは式Iの場合と同様に定義され上記した一般的方法により製造される]の化合物を50%ギ酸水溶液中触媒量のラネーニッケルを用いて接触還元する。この反応は90℃で50%ギ酸水溶液のような酸性水性溶媒混合物中で好都合に行なわれる。生成物は珪藻土パッドを通して冷却反応混合物を濾過し、濃縮し、正相クロマトグラフィーにより精製することにより好都合に単離される。
【0073】
方法A10
式XIIIの化合物の製造のための方法A10は下記工程を包含する。即ち:
下記式XII:
【化15】
Figure 2004528334
[式中R1、R2、R5、Ar、XおよびYは式Iの場合と同様に定義され上記した一般的方法により製造される]の化合物をナトリウムトリアセトキシボロハイドライドのような適当な還元剤の存在下第1または第2アミンを用いて還元的にアミノ化する。この反応は周囲温度で酢酸1〜1.5等量およびナトリウムトリアセトキシボロハイドライド1〜1.5等量を用いてテトラヒドロフラン中で好都合に行なわれる。生成物はホウ酸エステル中間体を1N塩酸で分解し、その後水抽出することにより好都合に単離される。有機抽出液を濃縮して粗生成物とし、正相クロマトグラフィーにより精製を行なう。
【0074】
方法A11
式XIVの化合物の製造のための方法A11は下記工程を包含する。即ち:
下記式XII:
【化16】
Figure 2004528334
[式中R1、R2、R6、Ar、XおよびYは式Iの場合と同様に定義され上記した一般的方法により製造される]の化合物をグリニャール試薬のような有機金属試薬とカップリングさせ、その後、中間体アルコールを酸化してケトンとする。グリニャール反応は0℃で臭化メチルマグネシウムのような有機マグネシウムハロゲン化物の6等量を用いてテトラヒドロフラン中で好都合に行なわれる。生成物は水を添加することにより過剰の有機金属試薬を分解することにより好都合に単離され、その後、水抽出し、有機抽出液を濃縮する。この中間体アルコールの酸化は、4Åのモレキュラーシーブの存在下、触媒量(約5モル%)のテトラプロピルアンモニウムパールテネート(TPAP)およびN−メチルモルホリン−N−オキシド(NMO)1〜1.5等量との反応により行なわれる。この反応は周囲温度でジクロロメタン中好都合に行なわれる。生成物は反応混合物を濃縮し、正相クロマトグラフィーにより精製することにより好都合に単離される。
【0075】
方法A12
式XVIの化合物の製造のための方法A12は下記工程を包含する。即ち:
(工程A1により調製された)下記式XV:
【化17】
Figure 2004528334
[式中R1、R2、R6、Ar、XおよびYは式Iの場合と同様に定義され上記した一般的方法により製造される]の化合物を50%エタノール水溶液のような水性溶媒中水酸化カリウムのような塩基を用いて加水分解することにより相当するアニリンに変換する。反応は長時間(8〜16時間)にわたり還流温度で好都合に行なわれる。生成物は反応混合物を周囲温度に冷却し、混合物を1N塩酸で酸性化し、沈殿した生成物を濾取することにより好都合に単離される。
【0076】
方法A13
式XVIIの化合物の製造のための方法A13は下記工程を包含する。即ち:
下記式XVI:
【化18】
Figure 2004528334
[式中R1、R2、Ar、XおよびYは式Iの場合と同様に定義され上記した一般的方法により製造される]の化合物を塩酸および酢酸水溶液中の亜硝酸ナトリウムと反応させて中間体ジアゾニウム塩とすることにより相当するスルホニルクロリドに変換する。この反応は−10℃未満で好都合に行なわれる。この中間体ジアゾニウム塩は塩化銅(I)の存在下酢酸中の二酸化イオウの新しく調製した飽和溶液に滴加することにより速やかにスルホニルクロリドに変換される。この反応は−10℃〜−5℃で好都合に行なわれる。生成物は、反応混合物を氷水に注ぎ込み、ジクロロメタンで抽出し、真空下に濃縮することにより好都合に単離される。式XVIIのスルホニルクロリドは典型的には更に精製することなく使用される。
【0077】
方法A14
式XVIIIの化合物の製造のための方法A14は下記工程を包含する。即ち:
下記式XVII:
【化19】
Figure 2004528334
[式中R1、R2、R6、Ar、XおよびYは式Iの場合と同様に定義され上記した一般的方法により製造される]の化合物を第1または第2アミンとの反応により相当するスルホンアミドに変換する。反応はピリジンのような酸スカベンジャーの存在下周囲温度でジクロロメタンのような非極性溶媒中で好都合に行なわれる。生成物は、水抽出により好都合に単離され、正相クロマトグラフィーにより精製される。
【0078】
方法A15
式XXの化合物の製造のための方法A15は下記工程を包含する。即ち:
下記式XIX:
【化20】
Figure 2004528334
[式中R2、R3、Ar、XおよびYは式Iの場合と同様に定義され上記した方法A1により製造される]の化合物をフェニルシランのようなカチオンスカベンジャーの存在下パラジウム(0)媒介脱アリル化反応を用いて式XXの化合物に変換する。生成物は水抽出により好都合に単離され、正相クロマトグラフィーにより精製される。
【0079】
方法A16
式XXの化合物の製造のための方法A16は下記工程を包含する。即ち:
下記式XXI:
【化21】
Figure 2004528334
[式中R2、R3、Ar、XおよびYは式Iの場合と同様に定義され上記した方法A2により製造される]の化合物をパラジウム接触還元条件下式XXの化合物に変換する。生成物は濾過により好都合に単離され、正相クロマトグラフィーにより精製するか、または、クロマトグラフィー精製することなく直接使用する。
【0080】
方法A17
式Iの化合物の製造のための方法A17は下記工程を包含する。即ち:
下記式XX:
【化22】
Figure 2004528334
[式中R1、R2、R3、Ar、XおよびYは式Iの場合と同様に定義される]の化合物をワンポット様式においてアルデヒドと反応させ、その後ボラン還元することにより式Iの相当する化合物に変換する。反応は周囲温度またはそれより高温において1,2−ジクロロエタンおよび酢酸のような混合溶媒中で好都合に行われる。生成物は水抽出により好都合に単離され、正相クロマトグラフィーまたは逆相クロマトグラフィーにより精製される。
【0081】
方法A18
本発明の更に別の特徴は、場合により加圧下(例えば1〜10気圧、好ましくは1〜5気圧、更に好ましくは2〜4気圧)において、水素の存在下、Pd/Cのようなパラジウム触媒で溶媒中、好ましくは酢酸エチルのような非極性溶媒中の化合物の溶液を処理することを包含する、化合物のフェニルまたはピリジル環上のアミノ置換基に対してオルト位のニトロ部分を、アミノ置換基に対してパラ位にあるニトロ部分の存在下において、選択的に還元するための方法である。特定の実施態様においては、両方のニトロ置換基はピリジン環の窒素に対してパラ位にある。典型的なプロトコルについては後述する実施例5Bが参照される。
【0082】
本発明の更に別の特徴は下記式VIII、XおよびXIII:
【化23】
Figure 2004528334
の中間体、および、式Iの化合物の合成におけるその使用である。
【0083】
本発明の化合物は以下のスキーム1〜15において示す操作法に従って合成してよい。
【0084】
【化24】
Figure 2004528334
【0085】
【化25】
Figure 2004528334
【0086】
【化26】
Figure 2004528334
【0087】
【化27】
Figure 2004528334
【0088】
【化28】
Figure 2004528334
【0089】
【化29】
Figure 2004528334
【0090】
【化30】
Figure 2004528334
【0091】
【化31】
Figure 2004528334
【0092】
【化32】
Figure 2004528334
【0093】
【化33】
Figure 2004528334
【0094】
【化34】
Figure 2004528334
【0095】
【化35】
Figure 2004528334
【0096】
【化36】
Figure 2004528334
【0097】
【化37】
Figure 2004528334
【0098】
【化38】
Figure 2004528334
【0099】
〔実施例〕
本発明は本発明の化合物を製造、精製、分析および生物学的試験に付す方法を記載した以下の実施例により更に詳細に説明されるが、本発明はこれらに限定されない。
【0100】
実施例1:生物学的評価
hCB1およびhCB2受容体結合
ヒトCB1(Receptor Biologyより入手)またはCB2(BioSignalより入手)膜を37℃で解凍し、25ゲージの平滑末端の針を3回通過させ、カンナビノイド結合緩衝液(5mM Tris、2.5mMEDTA、5mMMgCl2および0.5mg/ml BSA脂肪酸非含有、pH7.4)で希釈し、適切な量の蛋白を含有する分量づつ96穴プレートに分注する。hCB1およびhCB2での化合物のIC50値は、最終容量300μL中、ウェル当たり20000〜25000dpmの3H−CP55,940(0.17〜0.21nM)を用いて得た10点の用量応答曲線から評価する。総結合および非特異的結合はそれぞれ0.20μMのHU210の非存在下または存在下で測定する。プレートをボルテックスし、室温で60分間インキュベートし、洗浄緩衝液(50mM Tris、5mMMgCl2、0.5mgBSA、pH7.0)3mlを用いて、TomecまたはPackardハーベスターを装着したUnifiltersGF/B(あらかじめ0.1%ポリエチレンイミンに浸積)を通して濾過する。フィルターを55℃で1時間乾燥する。MS−20シンチレーション液65μl/ウェルを添加した後、TopCount(Packard)中で放射能(cpm)を計数する。
【0101】
hCB1およびhCB2 GTPγS結合
ヒトCB1(Receptor Biologyより入手)またはCB2(BioSignalより入手)膜を37℃で解凍し、25ゲージの平滑末端の針を3回通過させ、GTPγS結合緩衝液(5mM Hepes、20mMNaOH、100mMNaCl、0.1mMEDTA、5mMMgCl2、pH7.4、0.1%BSA)で希釈する。化合物のEC50およびEmaxは適切な量の蛋白および100000〜130000dpmのGTPg35S/ウェル(0.11〜0.14nM)を含有する300μl中で得た10点の用量応答曲線から評価する。ベースラインおよび最大刺激の結合を1μM(CB2)または10μM(CB1)のWin55,212−2の非存在下または存在下にそれぞれ測定する。膜は56.25μM(CB2)または112.5μM(CB1)のGDPと共に5分間予備インキュベートした後に、プレートに分注する(15μM(CB2)または30μM(CB1)の最終GDP)。プレートをボルテックスし、室温で60分間インキュベートし、洗浄緩衝液(50mM Tris、5mMMgCl2、50mMNaCl、pH7.0)3mlを用いて、TomecまたはPackardハーベスターを装着したUnifiltersGF/B(あらかじめ水に浸積)を通して濾過する。フィルターを55℃で1時間乾燥する。MS−20シンチレーション液65μl/ウェルを添加した後、TopCount(Packard)中で放射能(cpm)を計数する。拮抗剤退行試験は(a)アゴニストの用量応答曲線を一定濃度の拮抗剤の存在下に求めるか、または、(b)拮抗剤の用量応答曲線を一定濃度のアゴニストの存在下に求めることを除き、同様の方法で行う。選択された化合物の生物学的データを以下の表1に示す。
【0102】
【表1】
Figure 2004528334
【0103】
実施例2:
2−(4−メトキシベンジル)−N,N−ジエチル−1−[2−(4−モルホリニル)エチル]−1H−ベンズイミダゾール−5−カルボキサミド
2A:N,N−ジエチル−4−フルオロ−3−ニトロベンズアミド:
CH2Cl2(40ml)中の4−フルオロ−3−ニトロ安息香酸(25.0g、135ミリモル)およびチオニルクロリド(40.0ml、548ミリモル)の攪拌溶液を出発物質が消費されるまで還流した。溶媒をトルエン(2×20ml)と共に真空下に同時蒸発させた。この様にして得られたアシルクロリドをCH2Cl2(60ml)に溶解し、0℃に冷却し、その後激しく攪拌しながらジイソプロピルエチルアミン(DIPEA)(28.2ml、162ミリモル)およびジエチルアミン(14.0ml、135ミリモル)を添加した。室温で2時間の後、溶媒を真空下に蒸発させ、得られた油状物をEt2O(200ml)に溶解し、5%NaOH(3×100ml)、5%KHSO4(100ml)および塩水(100ml)で洗浄した。有機層をMgSO4上に乾燥し、濾過し、真空下に蒸発させた。粗製の油状物をEtOAc(10ml)に溶解し、−20℃で一夜の後、明橙色の固体を濾過し、冷EtOAc(5ml)およびヘキサン(10ml)で洗浄し、標題化合物(19.6g)を得た。濾液を蒸発させ、EtOAc(2ml)から同様に結晶化させ、更に明橙色の固体として標題化合物6.7g(80.5%)を得た。
1H NMR (CDCl3) :δ 8.11 (dd, J=7.6Hz, J=1.8Hz, 1H), 7.71-7.67 (m, 1H), 7.36 (dd,J=10.8Hz, J=8.4Hz, 1H), 3.56 (br s, 2H), 3.28 (br s, 2H), 1.22 (br s, 6H)。
【0104】
2B:N,N−ジエチル−4−{[2−(4−モルホリニル)エチル]アミノ}−3−ニトロベンズアミド
80%EtOH水溶液(05ml)中のN,N−ジエチル−4−フルオロ−3−ニトロベンズアミド(1.00g、4.16ミリモル)、2−(4−モルホリニル)エタンアミン(0.600ml、4.58ミリモル)の混合物を4時間還流下に加熱した。次に反応混合物を真空下に濃縮し、残存物をEtOAc(40ml)に溶解した。有機層を飽和NaHCO3(2×10ml)で洗浄し、合わせた水層をさらにEtOAc(2×20ml)で抽出した。合わせた有機層をMgSO4上に乾燥し、濾過し、真空下に濃縮し、標題化合物を得た。粗生成物をシリカゲルカラムクロマトグラフィー(100%EtOAc〜5%トリエチルアミン/EtOAc)で精製し、明黄色の固体として標題化合物(1.12g、77%)を得た。
1H-NMR (CDCl3) : δ 8.67 (s, 1H), 8.28 (d, J=1. 2 Hz, 1H), 7.56 (dd, J=8.8 Hz, J=1.6 Hz, 1H), 6.85 (d, J=8.8 Hz, 1H), 3.77 (t, J=5.2 Hz, 4H), 3.55-3.20 (br m, 6H), 2.74 (t, J=6.4 Hz, 2H), 2.53 (br s, 4H), 1.22 (t, J=6.8 Hz, 6H)。MS (ESI) (M+H)+= 351。
【0105】
2C:3−アミノ−N,N−ジエチル−4−{[2−(4−モルホリニル)エチル]アミノ}ベンズアミド
N,N−ジエチル−4−{[2−(4−モルホリニル)エチル]アミノ}−3−ニトロベンズアミド(1.10g、3.14ミリモル)およびMeOH中19%Pd/C(50ml)の混合物を40psiで2時間水素化した。反応終了後、反応混合物を珪藻土で濾過した。溶媒を除去することにより得られた標題化合物(0.958g、95%)は更に精製することなく使用した。MS(ESI)(M+H+)=321。
【0106】
2D:2−(4−メトキシベンジル)−N,N−ジエチル−1−[2−(4−モルホリニル)エチル]−1H−ベンズイミダゾール−5−カルボキサミド
(4−メトキシフェニル)アセチルクロリド(0.063g、0.343ミリモル)を酢酸(2ml)中の3−アミノ−N,N−ジエチル−4−{[2−(4−モルホリニル)エチル]アミノ}ベンズアミド(0.100g、0.312ミリモル)に添加し、混合物を一夜95℃で攪拌した。次に反応混合物を真空下に濃縮し、残存物をEtOAc(15ml)に溶解した。有機層を1NNaOH(2×8ml)で洗浄し、合わせた水層をさらに酢酸エチル(2×15ml)で抽出した。合わせた有機層をMgSO4上に乾燥し、濾過し、真空下に濃縮した。粗生成物を逆相高速液体クロマトグラフィー(HPLC)で精製し、トリフルオロ酢酸(TFA)塩として標題化合物を得た(0.132g、53%)。
1H NMR (DMSO-d6) :δ 7.74 (d, J=8.0 Hz, 1H), 7.57 (s, 1H), 7.34 (d, J=8.0 Hz, 1H), 7.25 (d, J=8.0 Hz, 2H), 6.91 (d, J=8. 0 Hz, 2H), 4.64 (t, J=7. (6 Hz, 2H), 4.36 (s, 2H) 3.76 (br s, 2H), 3.71 (s, 3H), 3.35 (br s, 4H), 3.20 (br s, 6H), 1.07(br s, 6H)。MS (ESI) (M+H)+= 451。
分析値(C26H34N4O3+ 3.0 TFA + 0.6 H2Oとしての):
計算値: C, 47.84; H, 4.79; N, 6.97。
実測値: C, 47.83; H, 4.83; N, 6.96。
【0107】
実施例3:
2−(4−エトキシベンジル)−N,N−ジエチル−1−(2−メトキシエチル)−1H−ベンズイミダゾール−5−カルボキサミド
3A:N,N−ジエチル−4−[(2−メトキシエチル)アミノ]−3−ニトロベンズアミド
一般的操作法2Bに従い、80%EtOH水溶液(5ml)中のN,N−ジエチル−4−フルオロ−3−ニトロベンズアミド(0.200g、0.833ミリモル)、2−メトキシエタンアミン(0.065ml、0.757ミリモル)の混合物を一夜90℃に加熱した。後処理後、粗生成物をシリカゲルカラムクロマトグラフィー(33%EtOAc/ヘキサン〜50%EtOAc/ヘキサン)により精製し、明黄色の固体として標題化合物(0.191g、85%)を得た。
1H NMR (CDCl3) : δ 8.34 (s, 1H), 8.28 (d, J=2.8 Hz, 1H), 7.56 (dd, J=8.4 Hz, J=1.6 Hz, 1H), 6.91 (d, J=9. 2 Hz, 1H), 3.69 (t, J=5.6 Hz, 2H), 3.53 (q, J=5.6 Hz,2H), 3.44 (s オーバーラッピング br s, 7H), 1.22 (t, J=6.4 Hz, 6H)。MS (ESI) (M+H)+= 296。
【0108】
3B:3−アミノ−N,N−ジエチル−4−[(2−メトキシエチル)アミノ]
一般的操作法2Cに従い、N,N−ジエチル−4−[(2−メトキシエチル)アミノ]−3−ニトロベンズアミド(0.150g、0.508ミリモル)およびEtOAc中10%Pd/C(15ml)の混合物を40psiで一夜水素化した。通常の後処理により得られた標題化合物(0.159g)は更に精製することなく使用した。
1H-NMR (CDCl3) : δ 6.86 (dd, J=8.4 Hz, J=2.0 Hz, 1H), 6.80 (d, J=1.6 Hz, 1H), 6.60 (d, J=8.0 Hz, 1H), 3.66 (t, J=5.6 Hz, 2H), 3.41 (s オーバーラッピング br s, 7H), 3.31 (t, J=5.6 Hz, 2H), 1.18 (t, J=7.6 Hz, 6H)。MS (ESI) (M+H)+= 266。
【0109】
3C:(4−エトキシフェニル)アセチルクロリド
ベンゼン(100ml)中の(4−エトキシフェニル)酢酸(10.0g、55.5ミリモル)の攪拌溶液に、チオニルクロリド(50ml、68.5ミリモル)を添加し、反応混合物を2時間80℃で攪拌した。溶媒を真空下に蒸発させ、粗生成物を蒸留(沸点86℃、0.4Torr)により精製し、黄色油状物として標題化合物(10.39g、94%)を得た。メチルエステルのMS:MS(ESI)(M+H)+=194
【0110】
3D:2−(4−エトキシベンジル)−N,N−ジエチル−1−(2−メトキシエチル)−1H−ベンズイミダゾール−5−カルボキサミド
一般的操作法2Dに従い、(4−エトキシフェニル)アセチルクロリド(0.107g、0.539ミリモル)をトルエン(2.5ml)中の3−アミノ−N,N−ジエチル−4−[(2−メトキシエチル)アミノ]ベンズアミド(0.130g、0.490ミリモル)に添加した。20分後、濃HCl1滴を添加し、混合物を12時間85℃に加熱した。通常の後処理の後、粗生成物を逆相HPLCにより精製し、油状物としてのTFA塩(0.120g、36%)として標題化合物を得た。
1H NMR (DMSO-d6): δ 7.86 (d, J=9.2 Hz, 1H), 7.63 (s, 1), 7.43 (d, J=8.4 Hz, 1H), 7.25 (d, J=8.4 Hz, 2H), 6.90 (d, J=9.2 Hz, 2H), 4.60 (t, J=4.8 Hz, 2H), 4.47 (s, 2H), 3.97 (q, J=7.6 Hz, 2H), 3.57 (m, 2H), 3.40 (br s, 2H), 3.20 (br s, 2H), 3.15 (s, 3H), 1.28 (t, J=7.6 Hz, 3H), 1.07 (br s, 6H)。MS (ESI) (M+H)+= 411。
分析値(C24H31N3O3+ 2.2 TFA + 0.6 H2Oとしての):
計算値: C, 50.82; H, 5.17; N, 6.26。
実測値: C, 50.85; H, 5.30; N, 6.06。
【0111】
実施例4:
1−[2−(アセチルアミノ)エチル]−2−(4−エトキシベンジル)−N,N−ジエチル−1H−ベンズイミダゾール−5−カルボキサミド
4A:4−{[2−(アセチルアミノ)エチル]アミノ}−N,N−ジエチル−3−ニトロベンズアミド
一般的操作法2Bに従い、80%EtOH水溶液(5ml)中のN,N−ジエチル−4−フルオロ−3−ニトロベンズアミド(0.200g、0.833ミリモル)、2−(2−アミノエチル)アセトアミド(0.077g、0.757ミリモル)の混合物を一夜90℃に加熱した。後処理後、粗生成物をシリカゲルカラムクロマトグラフィー(100%EtOAc〜5%MeOH/EtOAc)により精製し、明黄色の固体として標題化合物(0.152g、63%)を得た。
1H NMR (CDCl3) : δ8. 27 (d オーバーラッピング br s, J=2.0 Hz, 2H), 7.55 (dd, 7=8.4 Hz, J=2.0 Hz, 1H), 6.99 (d, J=9.2 Hz, 1H), 6.06 (br s, 1H), 3.58-3.50 (m, 4H), 3.44 (br s, 4H), 2.02 (s, 3H), 1.22 (t, J=7.2 Hz, 6H)。MS (ESI) (M+H)+= 323。
【0112】
4B:4−{[2−(アセチルアミノ)エチル]アミノ}−3−アミノ−N,N−ジエチルベンズアミド
一般的操作法2Cに従い、4−{[2−(アセチルアミノ)エチル]アミノ}−N,N−ジエチル−3−ニトロベンズアミド(0.150g、0.465ミリモル)およびEtOAc中10%Pd/C(15ml)の混合物を40psiで一夜水素化した。通常の後処理により得られた標題化合物(0.164g、100%)は更に精製することなく使用した。
1H-NMR (CDCl3) : δ6.83 (dd, J=8.0 Hz, J=2.0 Hz, 1H), 6.76 (d, J=2.0 Hz, 1H), 6.53 (d, J=8.4 Hz, 1H), 6.26 (br t, 1H), 3.53 (q, J=5.6 Hz, 2H), 3.43 (br s, 4H), 3.23 (t, J=5. 6 Hz, 2H), 1.99 (s, 3H), 1.17 (t, J=6.4 Hz, 6H)。MS (ESI) (M+H)+=293。
【0113】
4C:1−[2−(アセチルアミノ)エチル]−2−(4−エトキシベンジル)−N,N−ジエチル−1H−ベンズイミダゾール−5−カルボキサミド
一般的操作法2Dに従い、(4−エトキシフェニル)アセチルクロリド(0.097g、0.490ミリモル)をトルエン(2.5ml)中の4−{[2−(アセチルアミノ)エチル]アミノ}−3−アミノ−N,N−ジエチルベンズアミド(0.130g、0.445ミリモル)に添加した。20分後、濃HCl1滴を添加し、混合物を12時間85℃に加熱した。通常の後処理の後、粗生成物を逆相HPLCにより精製し、褐色固体としてのTFA塩(0.042g、14%)として標題化合物を得た。
NMR (DMSO-d6) : δ8.01 (t, J=5.6 Hz, 1H), 7.81 (d, J=8.4 Hz, 1H), 7.63 (s, 1), 7.45 (d, J=8.4 Hz, 1H), 7.26 (d, J=8.4 Hz, 2H), 6.90 (d, J=8.4 Hz, 2H), 4.43 (m, 4H), 3.97 (q, J=7.2 Hz, 2H), 3.40 (br s, 2H), 3.38 (t, J=4.8 Hz, 2H), 3.20 (br s, 2H), 3.15 (s, 3H), 1.61 (s, 3H), 1.28 (t, J=7.2 Hz, 3H), 1.06 (br s, 6H)。MS (ESI) (M+H)+= 437。
分析値(C25H32N4O3+ 2.1 TFA + 0.8 H2Oとしての):
計算値: C, 50.80; H, 5.21; N, 8.11。
実測値: C, 50.87; H, 5.87; N, 8.09。
【0114】
実施例5:
メチル3−[5−[(ジエチルアミノ)カルボニル]−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−1−イル]プロパノエート
5A:エチル3−{4−[(ジエチルアミノ)カルボニル]−2−ニトロアニリノ}プロパノエート
一般的操作法2Bに従い、80%EtOH水溶液(5ml)中のN,N−ジエチル−4−フルオロ−3−ニトロベンズアミド(0.200g、0.833ミリモル)、エチル3−アミノプロパノエート(0.116g、0.757ミリモル)の混合物を一夜90℃に加熱した。後処理後、粗生成物をシリカゲルカラムクロマトグラフィー(50%EtOAc/へキサン〜100%EtOAc)により精製し、標題化合物(0.162g、63%)を得た。
1H NMR (CDCl3) : δ8.34 (br t, J=5.6 Hz, 1H), 8.29 (d, J=2.0 Hz, 1H), 7.58 (dd, J=8.4 Hz, J=2.0 Hz, 1H), 6.92 (d, J=9.2 Hz, 1H), 4.21 (q, J=7.2 Hz, 2H), 3.69 (q, J=6.4 Hz, 2H), 3.44 (br s, 4H), 2.72 (t, J=6.4 Hz, 2H), 1.30 (t, J=6.4 Hz, 3H), 1.22 (t, J=6.8 Hz, 6H)。MS (ESI) (M+H)+= 338。
【0115】
5B:エチル3−{2−アミノ−4−[(ジエチルアミノ)カルボニル]アニリノ}プロパノエート
一般的操作法2Cに従い、エチル3−{4−[(ジエチルアミノ)カルボニル]−2−ニトロアニリノ}プロパノエート(0.150g、0.455ミリモル)およびEtOAc中10%Pd/C(15ml)の混合物を40psiで一夜水素化した。通常の後処理により得られた標題化合物(0.158g)は更に精製することなく使用した。
1H-NMR (CDCl3) : δ6.86 (dd, J=8.4 Hz, J=2.0 Hz, 1H), 6.80 (d, J=2.0 Hz, 1H), 6.62 (d, J=8.4 Hz, 1H), 4.18 (q, J=7.2 Hz, 2H), 3.46 (t および オーバーラッピング br s, J=5.6 Hz, 6H), 2.66 (t, J=6.8 Hz, 2H), 1.28 (t, J=7.2 Hz, 3H), 1.18 (t, J=6.8 Hz, 6H)。 MS (ESI) (M+H)+= 308。
【0116】
5C:メチル3−[5−[(ジエチルアミノ)カルボニル]−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−1−イル]プロパノエート
一般的操作法2Dに従い、(4−エトキシフェニル)アセチルクロリド(0.092g、0.465ミリモル)をトルエン(2.5ml)中のエチル3−{2−アミノ−4−[(ジエチルアミノ)カルボニル]アニリノ}プロパノエート(0.130g、0.423ミリモル)に添加した。20分後、濃HCl1滴を添加し、混合物を12時間85℃に加熱した。通常の後処理の後、粗生成物を逆相HPLC(MeOHとのエステル交換を伴う)で精製し、油状物としてのTFA塩(0.084g、30%)として標題化合物を得た。
1H NMR (DMSO-d6) : δ7.88 (d, J=9.2 Hz, 1H), 7.62 (s, 1H), 7.41 (d, J=8.4 Hz, 1H), 7.25 (d, J=8.0 Hz, 2H), 6.90 (d, J=8.4 Hz, 2H), 4.59 (t, J=6.4 Hz, 2H), 4.49 (s, 2H), 3.97 (q, J=6.4 Hz, 2H), 3.55 (s, 3H), 3.40 (br s, 2H), 3.16 (br s, 2H),2.77 (t, J=6.4 Hz, 2H), 1.28 (t, J=7.6 Hz, 3H), 1.07 (br s, 6H)。MS (ESI) (M+H)+= 438。
分析値(C25H31N3O4+ 1.8 TFA + 0.8 H2Oとしての):
計算値: C, 52.27; H, 5.28; N, 6.39。
実測値: C, 52.31; H, 5.22; N, 6.37。
【0117】
実施例6:
1−(2−アミノエチル)−2−(4−エトキシベンジル)−N,N−ジエチル−1H−ベンズイミダゾール−5−カルボキサミド
6A:t−ブチル2−{4−[(ジエチルアミノ)カルボニル]−2−ニトロアニリノ}エチルカーバメート
一般的操作法2Bに従い、80%EtOH水溶液(3ml)中のN,N−ジエチル−4−フルオロ−3−ニトロベンズアミド(0.200g、0.833ミリモル)、t−ブチル2−アミノエチルカーバメート(0.121g、0.757ミリモル)の混合物を一夜85℃に加熱した。後処理後、粗生成物をEtOAcから再結晶することにより精製し、明黄色の固体として標題化合物(0.165g、57%)を得た。
1H-NMR (CDCl3) : δ8.31 (br s, 1H), 8.29 (d, J=1.6 Hz, 1H), 7.57 (dd, J=9.6 Hz, J=2.0 Hz, 1H), 6.97 (d, J=9.6 Hz, 1H), 4.83 (br s, 1H), 3.55-3.40 (m, 8H), 1.47 (s, 9H), 1.22 (t, J=7.6 Hz, 6H)。MS (ESI) (M+H)+= 381。
【0118】
6B:t−ブチル2−{2−アミノ−4−[(ジエチルアミノ)カルボニル]アニリノ}エチルカーバメート
一般的操作法2Cに従い、t−ブチル2−{4−[(ジエチルアミノ)カルボニル]−2−ニトロアニリノ}エチルカーバメート(0.155g、0.407ミリモル)およびEtOAc中10%Pd/C(15ml)の混合物を40psiで一夜水素化した。通常の後処理により得られた標題化合物(0.164g)は更に精製することなく使用した。
1H-NMR (CDCl3) : δ6.85 (dd, J=8.4 Hz, J=1.6 Hz, 1H), 6.80 (d, J=2.0 Hz, 1H), 6.57 (d, J=7.6 Hz, 1H), 4.87 (br s, 1H), 3.48-3.38 (br s, 6H), 3.27 (t, J=5.6 Hz, 2H), 1.46 (s, 9H), 1.18 (t, J=6.8 Hz, 6H)。MS (ESI) (M+H)+351。
【0119】
6C:1−(2−アミノエチル)−2−(4−エトキシベンジル)−N,N−ジエチル−1H−ベンズイミダゾール−5−カルボキサミド
一般的操作法2Dに従い、(4−エトキシフェニル)アセチルクロリド(0.082g、0.424ミリモル)をトルエン(2.5ml)中のt−ブチル2−{2−アミノ−4−[(ジエチルアミノ)カルボニル]アニリノ}エチルカーバメート(0.135g、0.385ミリモル)に添加した。20分後、濃HCl1滴を添加し、混合物を12時間85℃に加熱した。通常の後処理の後、粗生成物を逆相HPLCにより精製し、白色固体としてのTFA塩(0.123g、44%)として標題化合物を得た。
1H NMR (CD3OD) : δ7.91 (d, J=8.4 Hz, 1H), 7.73 (s, 1H), 7.57 (dd, J=8.4 Hz, J=2.0 Hz, 2H), 7.30 (d, J=8.4 Hz, 2H), 6.97 (d, J=8.4 Hz, 2H), 4.75 (t, J=6.8 Hz, 2H), 4.55 (s, 2H), 4.03 (q, J=6.8 Hz, 2H), 3.58 (br s, 2H), 3.36 (t, J=6.4 Hz, 2H), 3.29 (br s, 2H), 1.37 (t, J=6.4 Hz, 3H), 1.27 (br s, 3H), 1.12 (br s, 3H)。MS(ESI) (M+H)+= 395。
分析値( C23H30N4O2+ 2.8 TFA + 0.8 H2Oとしての):
計算値: C, 47.17; H, 4.76; N, 7.69。
実測値: C, 47.16; H, 4.80; N, 7.52。
【0120】
実施例7:
1−{2−[アセチル(メチル)アミノ]エチル}−2−(4−エトキシベンジル)−N,N−ジエチル−1H−ベンズイミダゾール−5−カルボキサミド
CH2Cl2(3ml)中の生成物6C、1−(2−アミノエチル)−2−(4−エトキシベンジル)−N,N−ジエチル−1H−ベンズイミダゾール−5−カルボキサミド(0.085g、0.177ミリモル)、トリエチルアミン(0.070ml、0.50ミリモル)の溶液に、アセチルクロリド(0.015g、0.200ミリモル)を添加し、得られた混合物を15分間室温で攪拌した。混合物を飽和NaHCO3水溶液、塩水で洗浄し、有機層をMgSO4上に乾燥し、濾過し、真空下に濃縮した。
【0121】
上記粗生成物をジメチルホルムミド(DMF)(2ml)に溶解し、NaH(油中60%分散液、0.005g、0.217ミリモル)を添加し、混合物を20分間室温で攪拌した。溶媒を真空下に除去し、残存物をEtOAcに溶解した。有機層を飽和NaHCO3水溶液、塩水で洗浄し、MgSO4上に乾燥し、濾過し、真空下に濃縮した。粗生成物を逆相HPLCにより精製し、白色固体としてのTFA塩(0.017g、26%)として標題化合物を得た。
1H-NMR (CD3OD) : δ7.97 (d, J=8.4Hz, 1H), 7.69 (s, 1H), 7.59 (d, J=7.2Hz, 1H), 7.33 (d, J=8.4Hz, 2H), 6.96 (d, J=8.4Hz, 2H), 4.66 (t, J=6.0Hz, 2H), 4.60 (s, 2H), 4.02 (q, J=7.1Hz, 2H), 3.72 (t, J=6.0Hz, 2H), 3.56 (br, 2H), 3.28 (br, 4H), 3.06 (s, 3H), 1.79 (s, 3H), 1.36 (t, J=8.6Hz, 3H), 1.25 (br, 3H), 1.10 (br, 3H)。MS (ESI) (M+H)+= 451。
【0122】
実施例8:
2−(4−エトキシベンジル)−N,N−ジエチル−1−メチル−1H−ベンズイミダゾール−5−カルボキサミド
8A:N,N−ジエチル−4−(メチルアミノ)−3−ニトロベンズアミド
一般的操作法2Bに従い、80%EtOH水溶液(3ml)中のN,N−ジエチル−4−フルオロ−3−ニトロベンズアミド(0.125g、0.521ミリモル)、HClメチルアミン(0.035g、0.521ミリモル)の混合物を4時間85℃に加熱した。通常の後処理により得られた標題化合物(0.130g、100%)は更に精製することなく使用した。MS(ESI)(M+H)+=252
【0123】
8B:3−アミノ−N,N−ジエチル−4−(メチルアミノ)ベンズアミド
一般的操作法2Cに従い、N,N−ジエチル−4−(メチルアミノ)−2−ニトロベンズアミド(0.130g、0.517ミリモル)およびEtOAc中10%Pd/C(10ml)の混合物を40psiで水素化した。通常の後処理により得られた標題化合物(0.124g)は更に精製することなく使用した。MS(ESI)(M+H)+=222
【0124】
8C:2−(4−エトキシベンジル)−N,N−ジエチル−1−メチル−1H−ベンズイミダゾール−5−カルボキサミド
一般的操作法2Dに従い、(4−エトキシフェニル)アセチルクロリド(0.119g、0.596ミリモル)を酢酸(2ml)中の3−アミノ−N,N−ジエチル−4−(メチルアミノ)ベンズアミド(0.120g、0.542ミリモル)に添加し、混合物を一夜90℃で攪拌した。後処理の後、粗生成物を逆相HPLCにより精製し、赤色油状物としてのTFA塩(0.087g、26%)として標題化合物を得た。
1H NMR (DMSO-d6): δ7.90 (d, J=8.4 Hz, 1H), 7.70 (s, 1H), 7.49 (d, J=8.4 Hz, 1H), 7.29 (d, J=8.4 Hz, 2H), 6.92 (d, J=8.4 Hz, 2H), 4.50 (s, 2H), 3.98 (q, J=7.6 Hz, 2H), 3.93 (s, 3H), 3.42 (br s, 2H), 3.14 (br s, 2H), 1.28 (t, J=6.8 Hz, 3H), 1.11 (br s, 3H), 1.04 (br s, 3H)。MS (ESI) (M+H)+= 366。
分析値(C22H27N3O2+ 2.1 TFA + 0.2 H2Oとしての):
計算値: C, 51.71; H, 4.89; N, 6.91。
実測値: C, 51.73; H, 4.82; N, 6.93。
【0125】
実施例9:
2−(4−エトキシベンジル)−N,N−ジエチル−1−(2−フェニルエチル)−1H−ベンズイミダゾール−5−カルボキサミド
9A:N,N−ジエチル−3−ニトロ−4−[(2−フェニルエチル)アミノ]ベンズアミド
一般的操作法2Bに従い、80%EtOH水溶液(3ml)中のN,N−ジエチル−4−フルオロ−3−ニトロベンズアミド(0.125g、0.521ミリモル)、2−フェニルエタンアミン(0.065g、0.521ミリモル)の混合物を4時間85℃に加熱した。通常の後処理により得られた標題化合物(0.170g、96%)は更に精製することなく使用した。MS(ESI)(M+H)+=342
【0126】
9B:3−アミノ−N,N−ジエチル−4−[(2−フェニルエチル)アミノ]ベンズアミド
一般的操作法2Cに従い、N,N−ジエチル−3−ニトロ−4−[(2−フェニルエチル)アミノ]ベンズアミド(0.170g、0.498ミリモル)およびEtOAc中10%Pd/C(10ml)の混合物を40psiで水素化した。通常の後処理により得られた標題化合物(0.156g)は更に精製することなく使用した。MS(ESI)(M+H)+=312
【0127】
9C:2−(4−エトキシベンジル)−N,N−ジエチル−1−(2−フェニルエチル)−1H−ベンズイミダゾール−5−カルボキサミド
一般的操作法2Eに従い、(4−エトキシフェニル)アセチルクロリド(0.105g、0.530ミリモル)を酢酸(2ml)中の3−アミノ−N,N−ジエチル−4−[(2−フェニルエチル)アミノ]ベンズアミド(0.150g、0.482ミリモル)に添加し、混合物を一夜90℃で攪拌した。後処理の後、粗生成物を逆相HPLCにより精製し、紫色固体としてのTFA塩(0.100g、36%)として標題化合物を得た。
1H NMR (DMSO-d6) : δ7.74 (d, J=8.4 Hz, 1H), 7.62 (s, 1H), 7.34 (d, J=7.2 Hz, 1H), 7.24-7.19 (m, 5H), 7.10 (d, J=8.4 Hz, 2H), 6.91 (d, J=8.4 Hz, 2H), 4.56 (t, J=7.2 Hz, 2H), 4.23 (s, 2H), 3.97 (q, J=6.8 Hz, 2H), 3.40 (br s, 2H), 3.19 (br s,2H), 2.86 (t, J=7.2 Hz, 2H), 1.28 (t, J=6.8 Hz, 3H), 1.08 (br s, 6H)。MS (ESI) (M+H)+= 456。
分析値(C29H33N3O2+ 1.0 TFA + 0.2 H2Oとしての):
計算値: C, 64.96; H, 6.05; N, 7.33。
実測値: C, 65.05; H, 6.09; N, 7.29。
【0128】
実施例10:
2−(4−エトキシベンジル)−N,N−ジエチル−1−[2−(1−ピペリジニル)エチル]−1H−ベンズイミダゾール−5−カルボキサミド
10A:N,N−ジエチル−3−ニトロ−4−{[2−(1−ピペリジニル)エチル]アミノ}ベンズアミド
一般的操作法2Bに従い、80%EtOH水溶液(30ml)中のN,N−ジエチル−4−フルオロ−3−ニトロベンズアミド(1.0g、4.2ミリモル)、2−(1−ピペリジニル)エタンアミン(0.564ml、3.96ミリモル)の混合物を10時間85℃に加熱した。通常の後処理の後、粗生成物を1NHCl(40ml)に溶解し、CH2Cl2(2×10ml)で洗浄した。水層を5NNaOH(10ml)で塩基性化し、CH2Cl2(3×10ml)で抽出した。合わせた有機層をNa2SO4上に乾燥し、濾過し、真空下に濃縮し、明黄色の固体として得られた標題化合物(0.800g、57%)を更に精製することなく使用した。
1H NMR (CDCl3) : δ8.64 (br s, 1H), 8.25 (d, J=2.4 Hz, 1H), 7.53 (d, J=8.8 Hz, 1H), 6.82 (d, J=8.8 Hz, 1H), 3.41 (br s, 4H), 3.35 (br s, 2H), 2.64 (br s, 2H), 2.53 (br s, 4H), 1.61 (br s, 4H), 1.44 (br s, 2H), 1.19 (t, J=7.0 Hz, 6H)。
【0129】
10B:3−アミノ−N,N−ジエチル−4−{[2−(1−ピペリジニル)エチル]アミノ}ベンズアミド
一般的操作法2Cに従い、N,N−ジエチル−3−ニトロ−4−{[2−(1−ピペリジニル)エチル]アミノ}ベンズアミド(0.800g、2.30ミリモル)およびEtOAc中10%Pd/C(30ml)の混合物を30psiで24時間水素化した。通常の後処理により得られた標題化合物(0.724g)は更に精製することなく使用した。
【0130】
10C:2−(4−エトキシベンジル)−N,N−ジエチル−1−[2−(1−ピペリジニル)エチル]−1H−ベンズイミダゾール−5−カルボキサミド
一般的操作法2Dに従い、トルエン中1Mの(4−エトキシフェニル)アセチルクロリド(0.095g、0.095ミリモル)をトルエン(1.0ml)中の3−アミノ−N,N−ジエチル−4−{[2−(1−ピペリジニル)エチル]アミノ}ベンズアミド(0.027g、0.856ミリモル)に添加した。20分後、濃HCl1滴を添加し、混合物を一夜85℃に加熱した。後処理の後、粗生成物を逆相HPLCにより精製し、TFA塩(0.026g、39%)として標題化合物を得た。
1H NMR (CD3OD) : δ 7.89 (d, J=8.0 Hz, 1H), 7.70 (s, 1H), 7.52 (d, J=8.4 Hz, 1H), 7.27 (d, J=7.6 Hz, 2H), 6.96 (d, J=7.2 Hz, 2H), 4.52 (s, 2H), 4.02 (q, J=7.6 Hz, 2H), 3.56 (br s, 4H), 3.34 (t, J=7.6 Hz, 2H), 3.28 (br s, 4H), 3.00 (br s, 2H), 1.88 (br s, 4H), 1.53 (br s, 2H), 1.36 (t, J=6.4 Hz, 3H), 1.25 (br s, 3H), 1.11 (br s, 3H)。MS (ESI) (M+H)+= 463。
分析値(C28H38N4O2+ 2.6 TFA + 0.5 H2Oとしての):
計算値: C, 51.92; H, 5.46; N, 7.29。
実測値: C, 51.94; H, 5.43; N, 7.25。
【0131】
実施例11:
1−[2−(ジメチルアミノ)−1−メチルエチル]−2−(4−エトキシベンジル)−N,N−ジエチル−1H−ベンズイミダゾール−5−カルボキサミド
11A:4−{[2−(ジメチルアミノ)−1−メチルエチル]アミノ}−N,N−ジエチル−3−ニトロベンズアミド
N,N−ジエチル−4−フルオロ−3−ニトロベンズアミド(0.500g、2.08ミリモル)、N1,N1−ジメチル−1,2−プロパンジアミン(0.636g、6.24ミリモル)、DIPEA(2.2ml、12.5ミリモル)およびDMF(12ml)の混合物を室温で4時間攪拌した。次に反応混合物を真空下に濃縮し、残存物を2NNaOH(30ml)に溶解し、CH2Cl2(3×40ml)で抽出した。合わせた有機層を塩水(10ml)で洗浄し、MgSO4上に乾燥し、濾過し、真空下に濃縮した。粗製の反応混合物をシリカゲルカラムクロマトグラフィー(100%CH2Cl2〜5%MeOH/CH2Cl2)により精製し、明黄色固体として標題化合物(0.621g、93%)を得た。
1H NMR (CDCl3) : δ8.33 (d, J=6.4 Hz, 1H), 8.27 (d, J=2.0 Hz, 1H), 7.55 (dd, J=8.8 Hz, J=2.0 Hz, 1H), 6.91 (d, J=9.6 Hz, 1H), 3.79 (ヘプテット, J=7.2 Hz, 1H), 3.45 (br d, J=5.2 Hz, 4H), 2.55 (dd, J=12.0 Hz, J=7.6 Hz, 1H), 2.39 (dd, J=12.4 Hz, J=5.8 Hz, 1H), 2.29 (s, 6H), 1.69 (br s, 1H), 1.31 (d, J=6.8 Hz, 2H), 1.22 (t, J=7.4 Hz, 6H)。MS (ESI) (M+H)+= 323。
【0132】
11B:3−アミノ−4−{[2−(ジメチルアミノ)−1−メチルエチル]アミノ}−N,N−ジエチルベンズアミド
一般的操作法2Cに従い、4−{[2−(ジメチルアミノ)−1−メチルエチル]アミノ}−N,N−ジエチル−3−ニトロベンズアミド(0.516g、1.60ミリモル)およびEtOAc中10%Pd/C(20ml)の混合物を35psiで一夜水素化した。通常の後処理により得られた標題化合物(0.408g、87%)は更に精製することなく使用した。
1H-NMR (CDCl3) : δ6.82 (dd, J=8.0 Hz, J=2.0 Hz, lH), 6.77 (d, J=2.4 Hz, 1H), 6.62 (d, J=8.0 Hz, 1H), 3.52-336 (m, 6H), 2.52 (dd, J=12.0 Hz, J=9.6 Hz, 2H), 2.28-2.19 (m, 7H), 1.17 (m, 8H)。MS (ESI) (M+H)+= 293。
【0133】
11C:1−[2−(ジメチルアミノ)−1−メチルエチル]−2−(4−エトキシベンジル)−N,N−ジエチル−1H−ベンズイミダゾール−5−カルボキサミド
一般的操作法2Dに従い、トルエン中1Mの(4−エトキシフェニル)アセチルクロリド(0.095g、0.095ミリモル)をトルエン(1.0ml)中の3−アミノ−4−{[2−(ジメチルアミノ)−1−メチルエチル]アミノ}−N,N−ジエチルベンズアミド(0.025g、0.0856ミリモル)に添加した。20分後、濃HCl1滴を添加し、混合物を一夜85℃に加熱した。後処理の後、粗生成物を逆相HPLCにより精製し、TFA塩(0.024g、38%)として標題化合物を得た。
1H NMR (CD3OD) : δ7.96 (d, J=8.4 Hz, 1H), 7.72 (s, 1H), 7.47 (d, J=7.6 Hz, 2H),7.24 (m, 2H), 6.94 (m, 2H), 5.20 (br s, 1H), 4.50 (s, 2H), 4.03-3.95 (m, 3H), 3.77 (dd, J=14.0 Hz, J=5.6 Hz, 1H), 3.56 (br s, 2H), 3.28 (m, 2H), 2.81 (s, 6H), 1.56 (d, J=6.8 Hz, 3H), 1.35 (t, J=6.4 Hz, 3H), 1.25 (br s, 3H), 1.14 (br s, 3H)。MS (ESI) (M+H)+= 437。
分析値(C26H36N4O2+ 2.5 TFA + 0.7 H2Oとしての):
計算値: C, 50.71; H, 5.48; N, 7.63。
実測値: C, 50.76; H, 5.46; N, 7.61。
【0134】
実施例12:
1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−N,N−ジエチル−1H−ベンズイミダゾール−5−カルボキサミド
12A:4−[(シクロプロピルメチル)アミノ]−N,N−ジエチル−3−ニトロベンズアミド
一般的操作法2Bに従い、80%水性エタノール(17ml)中のN,N−ジエチル−4−フルオロ−3−ニトロベンズアミド(0.823g、3.42ミリモル)およびシクロプロピルメタンアミン(0.39ml、4.50ミリモル)を16時間85℃で攪拌した。橙色固体である粗生成物(1.00g)を次に工程に用いた。
1H-NMR (CD3OD): δ8.23 (d, J=2.0 Hz, 1H), 7.55 (dd, J=9.2 Hz, J=2.0 Hz, 1H), 7.09 (d, J=9.2 Hz, 1H), 3.47 (br s, 3H), 3.31 (q, J=2.0 Hz, 2H), 3.27 (d, J=6.4 Hz,2H), 1.23 (オーバーラッピング t および m, J=7.0 Hz, 7H), 0.68-0.60 (m, 2H), 0.40-0.34 (m, 2H)。MS (ESI) (M+H)+= 292。
【0135】
12B:3−アミノ−4−[(シクロプロピルメチル)アミノ]−N,N−ジエチルベンズアミド
一般的操作法2Cに従い、4−[(シクロプロピルメチル)アミノ]−N,N−ジエチル−3−ニトロベンズアミド(1.00g)を24時間水素化し、緑味を帯びた褐色固体として標題化合物(0.889g)を得た。粗生成物を次の工程に用いた。
1H NMR (CD3OD): δ 6.72-6.78 (m, 2H), 6.58 (d, J=8.4 Hz, 1H), 3.43 (br s, 4H), 2.99 (d, J=6.4 Hz, 2H), 1.18 (オーバーラッピング br t および m, J=6.4 Hz, 7H), 0.59-0.52 (m, 2H), 0.30-0.24 (m, 2H)。 MS (ESI) (M+H)+= 262。
【0136】
12C:1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−N,N−ジエチル−1H−ベンズイミダゾール−5−カルボキサミド
一般的操作法2Dに従い、(4−エトキシフェニル)アセチルクロリド(0.1109g、0.547ミリモル)を酢酸(2ml)中の3−アミノ−4−[(シクロプロピルメチル)アミノ]−N,N−ジエチルベンズアミド(0.130g、0.497ミリモル)に添加し、混合物を一夜90℃で攪拌した。後処理の後、粗生成物を逆相HPLCにより精製し、油状物としてのTFA塩(0.042g、14%)として標題化合物を得た。
1H NMR (DMSO-d6): δ 7.59 (d, J=8.4 Hz, 1H), 7.30 (s, 1H), 7.08 (d, J=7.2 Hz, 1H), 6.91 (d, J=9.2 Hz, 2H), 6.53 (d, J=8.4 Hz, 2H), 4.14 (s, 2H), 3.97 (d, J=7.2 Hz, 2H), 3.60 (q, J=6.4 Hz, 2H), 3.04 (br s, 2H), 2.80 (br s, 2H), 0.90 (t, J=6.4 Hz, 3H), 0.78 (br m, 7H), 0.10-0.03 (m, 4H)。MS (ESI) (M+H)+= 406。
分析値(C25H31N3O2+ 1.9 TFAとしての):
計算値: C, 55.60; H, 5.33; N, 6.75。
実測値: C, 55.51; H, 5.25; N, 6.74。
【0137】
実施例13:
1−(シクロプロピルメチル)−2−[(6−エトキシ−3−ピリジニル)メチル]−N,N−ジエチル−1H−ベンズイミダゾール−5−カルボキサミド
15A:(6−エトキシ−3−ピリジニル)酢酸
EtOH(1.6ml)中の(6−クロロ−3−ピリジニル)酢酸(0.094g、0.545ミリモル)の攪拌溶液に、EtOH中3.1mのEtONa(0.7ml、2.17ミリモル)を添加し、反応混合物を100℃で攪拌し、室温で24時間の後、過剰のNaH(油中60%分散液)をEtOH1mlと共に添加し、100℃の加熱を96時間継続した。溶媒を真空下に除去し、残存物をジエチルエーテル(5ml)に溶解した。有機層を希HCl(2×2ml)および塩水(2ml)で洗浄し、MgSO4上に乾燥し、濾過し、真空下に濃縮し、淡茶色の固体として得られた標題化合物(0.081g、82%)を更に精製することなく使用した。
1H NMR(CDCl3) : δ10.06 (br s, 1H), 8.06 (s, 1H), 7.55 (d, J=9.2Hz, 1H), 6.72 (d, J=8.4Hz, 1H), 4.30 (q, J=6.1Hz, 2H), 3.58 (s, 2H), 1.38 (t, J=8.0, 3H)。MS (ESI) (M+H)+= 182。
【0138】
13B:1−(シクロプロピルメチル)−2−[(6−エトキシ−3−ピリジニル)メチル]−N,N−ジエチル−1H−ベンズイミダゾール−5−カルボキサミド
DMF(2ml)中の(6−エトキシ−3−ピリジニル)酢酸(0081g、0.448ミリモル))の攪拌溶液に、O−(7−アザベンゾトリアゾール−1−イル)−N,N,N’,N’−テトラメチルウロニオウムヘキサフルオロホスフェート(HATU)(0.178g、0.486ミリモル)およびDIPEA(0.156ml、0.895ミリモル)を添加し、反応混合物を10分間室温で攪拌した。3−アミノ−4−[(シクロプロピルメチル)アミノ]−N,N−ジエチルベンズアミド(0.111g、0.448ミリモル)を添加し、得られた混合物を室温で1時間攪拌した。混合物をEtOAc(15ml)で希釈し、飽和NaHCO3(8ml)、ついで塩水(8ml)で洗浄し、MgSO4上に乾燥し、真空下に濃縮し、得られた粗製のアミドを更に精製することなく使用した。
【0139】
上記粗製の中間体を酢酸(5ml)に溶解し、混合物を一夜90℃に加熱した。反応混合物を濃縮し、残存物をEtOAc(15ml)に溶解した。有機層を1NNaOH(2×8ml)、次いで塩水(8ml)で洗浄し、MgSO4上に乾燥し、真空下に濃縮した。粗生成物をシリカゲルカラムクロマトグラフィー(2%MeOH/EtOAc)で精製し、明茶色固体として標題化合物(0.111g、65%)を得た。
1H NMR (CDCl3) : δ8.05 (s, 1H), 7.75 (s, 1H), 7.49 (d, J=8.4 Hz, 1H), 7.38-7.30(m, 2H), 6.68 (d, J=8.4 Hz, 1H), 4.32 (qd, J=7.2 Hz, J=2.2 Hz, 2H), 4.25 (s, 2H), 3.55 (br s, 2H), 3.38 (br s, 2H), 1.38 (td, J=6.8 Hz, J=2.0 Hz, 3H), 1.22 (brs, 6H), 1.12-1.03 (m, 1H), 0.60-0.54 (m, 2H), 0.33-0.28 (m, 2H)。MS (ESI) (M+H)+= 407。
分析値(C24H25N4O2+ 0.2 H2Oとしての):
計算値: C, 70.63; H, 7.01; N, 13.73。
実測値: C, 70.83; H, 7.50; N, 13.67。
【0140】
実施例14:
1−[2−(ジメチルアミノ)エチル]−2−[2−(4−エトキシフェニル)エチル]−N,N−ジエチル−1H−ベンズイミダゾール−5−カルボキサミド
14A:4−{[2−(ジメチルアミノ)エチル]アミノ}−N,N−ジエチル−3−ニトロベンズアミド
一般的操作法2Bに従い、N,N−ジエチル−4−フルオロ−3−ニトロベンズアミド(0.534g、2.22ミリモル)およびN1,N1−ジメチル−1,2−エタンジアミン(0.22ml、2.02ミリモル)を14時間85℃で攪拌した。粗生成物を1NHCl中に溶解してEt2O(2×15ml)でえきすることにより精製した。水層を5NNaOHでpH11に合わせ、次にCH2Cl2(4×15ml)で抽出した。合わせたCH2Cl2層をMgSO4上に乾燥し、濾過し、真空下に濃縮し、橙色油状物として標題化合物(0.560g、82%)を得た。
1H-NMR (CD3OD) : δ8.22 (d, J=2.8 Hz, 1H), 7.56 (dd, J=8.4 Hz, J=2.8 Hz, 1H), 7.09 (d, J=8.4 Hz, 1H), 3.53-3.40 (オーバーラッピング t, J=6.4 Hz, および br s, 6H), 2.67 (t, J=6.4 Hz, 2H), 2.33 (s, 6H), 1.22 (t, J=7.6 Hz, 6H)。MS (ESI) (M+H)+= 309。
【0141】
14B:3−アミノ−4−{[2−(ジメチルアミノ)エチル]アミノ}−N,N−ジエチルベンズアミド
一般的操作法2Cに従い、4−{[2−(ジメチルアミノ)エチル]アミノ}−N,N−ジエチル−3−ニトロベンズアミド(0.560g、1.82ミリモル)を3時間水素化し、緑味を帯びた褐色固体として標題化合物(0.531g)を得た。粗生成物を次の工程に用いた。
1H NMR (CD3OD) : δ6.77, 6.76 (オーバーラッピング s および dd, J=6.4 Hz, J=2.0 Hz, 2H), 6.61 (d, J=8.4 Hz, 1H), 3.45 (br s, 4H), 3.29 (t, J=6.4 Hz, 2H), 2.66 (t, J=6.4 Hz, 2H), 2.34 (s, 6H), 1.19 (br t, J=6.8 Hz, 6H)。MS (ESI) (M+H)+= 279。
【0142】
14C:1−[2−(ジメチルアミノ)エチル]−2−[2−(4−エトキシフェニル)エチル]−N,N−ジエチル−1H−ベンズイミダゾール−5−カルボキサミド
一般的操作法13Bに従い、3−(4−エトキシフェニル)プロパン酸(0.0386g、0.198ミリモル)、HATU(0.0756g、0.199ミリモル)、DIPEA(0.047ml、0.27ミリモル)および4−{[2−(ジメチルアミノ)エチル]アミノ}−N,N−ジエチル−3−アミノベンズア(0.0503g、0.180ミリモル)を混合した。粗生成物をカラムクロマトグラフィー(9:1CH2Cl2:MeOH)で精製し、標題化合物を得た(0.0284g、36%)。
1H-NMR (CD3OD): δ7.64 (s, 1H), 7.53 (d, J=8.4 Hz, 1H), 7.29 (d, J=8.4 Hz, 1H), 7.06 (d, J=8.4 Hz, 2H), 6.78 (d, J=8.4 Hz, 2H), 4.14 (t, J=8.0 Hz, 2H), 3.96 (q,J=7.2 Hz, 2H), 3.57 (br s, 2H), 3.35 (br s, 2H), 3.21-3.10 (m, 4H), 2.43 (t, J=7.6 Hz, 2H), 2.26 (s, 6H), 1.34 (t, J=7.2 Hz, 3H), 1.26, 1.16 (2 オーバーラッピング br s, 6H)。
13C-NMR (CD3OD): δ174.03,159.16,158.09,142.67,136.55,133.78,132.24,130.54,122.10,117.34,115.65,111.44,64.43,58.74,45.80,45.16,42.64,41.00,34.46,30.53,15.18, 14.43,13.12。MS (ESI) (M+H)+= 437。
HCl塩はEt2O中のHClを用いて調製した。凍結乾燥後、白色固体を得た。
分析値(C26H36N4O2・2.8 HCl・2.2 H2Oとしての):
計算値: C, 54.00; H, 7.53; N, 9.69。
実測値: C, 54.12; H, 7.53; N, 9.36。
【0143】
実施例15:
1−(シクロプロピルメチル)−2−[2−(4−エトキシフェニル)エチル]−N,N−ジエチル−1H−ベンズイミダゾール−5−カルボキサミド
一般的操作法13Bに従い、3−(4−エトキシフェニル)プロパン酸(0.0409g、0.211ミリモル)、HATU(0.0801g、0.211ミリモル)、DIPEA(0.050ml、0.29ミリモル)および3−アミノ−4−[(シクロプロピルメチル)アミノ]−N,N−ジエチルベンズアミド(0.0500g、0.191ミリモル)を混合した。粗生成物をカラムクロマトグラフィー(19:1CH2Cl2:MeOH)で精製し、標題化合物を得た(0.0457g、57%)。
1H NMR (CD3OD): δ 7.64 (s, 1H), 7.55 (d, J=8.4 Hz, 1H), 7.27 (d, J=8.4 Hz, 1H),7.08 (d, J=8.4 Hz, 2H), 6.77 (d, J=8.4 Hz, 2H), 3.97 (d, J=7.2 Hz, 2H), 3.95 (q, J=6.8 Hz, 2H), 3.57 (br s, 2H), 3.34 (br s, 2H), 3.23-3.07 (m, 4H), 1.34 (t, J=6.4 Hz, 3H), 1.36-1.02 (オーバーラッピング 2×br s および m, 7H), 0.55-0.46 (m,2H), 0.40-0.32 (m, 2H)。
13C-NMR (CD3OD): δ174.08,159.08,157.72,142.60,136.95,133.70,132.03,130.46, 121.97,117.21,115.59,111.83,64.41,48.69,45.15,40.98,34.38,30.54,15.18,14.43,13.12, 12.15,4.54。MS (ESI) (M+H)+= 420。
HCl塩はEt2O中のHClを用いて調製した。凍結乾燥後に白色固体を得た。
分析値(C26H33N3O2・1.0 HCl・0.8 H2Oとしての):
計算値: C, 66.38; H, 7.63; N, 8.93。
実測値: C,66.35 ; H, 7.60; N, 8.81。
【0144】
実施例16:
2−(4−エトキシベンジル)−N,N−ジエチル−1−イソペンチル−1H−ベンズイミダゾール−5−カルボキサミド
16A:N,N−ジエチル−4−(イソペンチルアミノ)−3−ニトロベンズアミド
一般的操作法2Bに従い、N,N−ジエチル−4−フルオロ−3−ニトロベンズアミド(1.077g、4.48ミリモル)および3−メチル−1−ブタンアミン(0.68ml、5.83ミリモル)を14時間85℃で攪拌し、橙色油状物として標題化合物(1.425g)を得た。粗生成物を次の工程に用いた。
1H-NMR (CD3OD): δ8.22 (d, J=2.0 Hz, 1H), 7.56 (dd, J=9.2 Hz, J=2.0 Hz, 1H), 7.09 (d, J=9.2 Hz, 1H), 3.52-3.40 (br m, 6H), 1.83-1.72 (m, 1H), 1.64 (q, J=7.6 Hz,2H), 1.23 (t, J=7.6 Hz, 6H), 1.01 (d, J=6.8 Hz, 6H)。 MS (ESI) (M+H)+= 308。
【0145】
16B:3−アミノ−N,N−ジエチル−4−(イソペンチルアミノ)ベンズアミド
一般的操作法2Cに従い、N,N−ジエチル−4−(イソペンチルアミノ)−3−ニトロベンズアミド(1.425g、4.64ミリモル)を4時間水素化し、深青色固体として標題化合物(1.312g)を得た。粗生成物を次の工程に用いた。
1H-NMR (CD3OD) : δ6.78-6.74 (m, 2H), 6.58 (d, J=8.4 Hz, 1H), 3.45 (br s, 4H), 3.17 (t, J=7.6 Hz, 2H), 1.83-1.72 (m, 1H), 1.59 (q, J=7.2 Hz, 2H), 1.19 (t, J=6.4Hz, 6H), 0.98 (d, J=6.4 Hz, 6H)。MS (ESI) (M+H)+= 278。
【0146】
16C:2−(4−エトキシベンジル)−N,N−ジエチル−1−イソペンチル−1H−ベンズイミダゾール−5−カルボキサミド
一般的操作法13Bに従い、(4−エトキシフェニル)酢酸(0.110g、0.612ミリモル)、HATU(0.233g、0.611ミリモル)、DIPEA(0.15ml、0.86ミリモル)および3−アミノ−N,N−ジエチル−4−(イソペンチルアミノ)ベンズアミド(0.154g、0.556ミリモル)を混合した。粗生成物をカラムクロマトグラフィー(19:1CH2Cl2:MeOH)で精製し、標題化合物を得た(0.211g、90%)。
1H NMR (CD3OD): δ7.67 (s, 1H), 7.50 (d, J=8.4 Hz, 1H), 7.30 (dd, J=8.4 Hz, J=2.0 Hz, 1H), 7.16 (d, J=9.2 Hz, 2H), 6.86 (d, J=8.4 Hz, 2H), 4.28 (s, 2H), 4.12 (m, 2H), 3.98 (q, J=7.6 Hz, 2H), 3.57 (br s, 2H), 3.34 (br s, 2H), 1.62-1.48 (m, 1H), 1.34 (t, J=7.6 Hz, 3H), 1.36-1.07 (オーバーラッピング 2× br s および m, 8H), 0.88 (d, J=6.8 Hz, 6H)。MS (ESI) (M+H)+= 422。
分析値(C26H35N3O2・1.7 TFA・0.2 H2Oとしての):
計算値: C, 57.05; H, 6.04; N, 6.79。
実測値: C, 57.11; H, 6.09; N, 6.69。
【0147】
実施例17:
2−(4−エトキシベンジル)−N,N−ジエチル−1−(4−ピリジニルメチル)−1H−ベンズイミダゾール−5−カルボキサミド
17A:N,N−ジエチル−3−ニトロ−4−[(4−ピリジニルメチル)アミノ]ベンズアミド
一般的操作法2Bに従い、N,N−ジエチル−4−フルオロ−3−ニトロベンズアミド(0.272g、1.13ミリモル)および4−ピリジニルメタンアミン(0.11ml、1.12ミリモル)を87時間室温で攪拌した。粗生成物をカラムクロマトグラフィー(100%EtOAc、次いで9:1CH2Cl2/MeOH)で精製することにより、標題化合物(0.181g、60%)を得た。
1H NMR (CD3OD): δ8.49 (d, J=6.4 Hz, 2H), 8.27 (d, J=2.8 Hz, 1H), 7.50-7.42 (m, 3H), 6.87 (d, J=8.4 Hz, 1H), 4.77 (s, 2H), 3.44 (br s, 4H), 1.21 (t, J=7.2 Hz, 6H). MS (ESI) (M+H)+= 329。
【0148】
17B:3−アミノ−N,N−ジエチル−4−[(4−ピリジニルメチル)アミノ]ベンズアミド
一般的操作法2Cに従い、N,N−ジエチル−3−ニトロ−4−[(4−ピリジニルメチル)アミノ]ベンズアミド(0.181g、0.551ミリモル)を20時間水素化し、粘稠な茶色油状物として標題化合物(0.172g)を得た。粗生成物を次の工程に用いた。
1H NMR (CD3OD) : δ8.45 (d, J=6.8 Hz, 2H), 7.46 (d, J=6.4 Hz, 2H), 6.79 (d, J=2.0 Hz, 1H), 6.64 (dd, J=7.2 Hz, J=2.0 Hz, 1H), 6.36 (d, J=8.4Hz, lH), 4.51 (s, 2H), 3.42 (br s, 4H), 1.17 (br t, 6H)。MS (ESI) (M+H)+= 299。
【0149】
17C:2−(4−エトキシベンジル)−N,N−ジエチル−1−(4−ピリジニルメチル)−1H−ベンズイミダゾール−5−カルボキサミド
一般的操作法13Bに従い、(4−エトキシフェニル)酢酸(0.0364g、0.202ミリモル)、HATU(0.0768g、0.202ミリモル)、DIPEA(0.048ml、0.28ミリモル)および3−アミノ−N,N−ジエチル−4−[(4−ピリジニルメチル)アミノ]ベンズアミド(0.0548g、0.184ミリモル)を混合した。粗生成物を逆相MPLC(勾配水中10〜50%CH3CN)により精製し、TFA塩として標題化合物(0.0459g、36%)を得た。この物質を水/ジオキサンから凍結乾燥し、白色固体を得た。
1H-NMR (CD3OD): δ8.60 (br s, 2H), 7.87 (s, 1H), 7.70 (d, J=8.4 Hz, 1H), 7.52 (dd, J=8.4 Hz, J=2.0 Hz, 1H), 7.42 (d, J=5.6 Hz, 2H), 7.13 (d, J=8.4 Hz, 2H), 6.71(d, J=9.6 Hz, 2H), 6.06 (s, 2H), 4.54 (s, 2H), 3.93 (q, J=7.2 Hz, 2H), 3.59 (brs, 2H), 3.31 (br s, 2H), 1.35 (t, J=6.8 Hz, 3H), 1.38-1.04 (2 × br s, 6H)。 MS(ESI) (M+H)+= 443。
分析値(C27H30N4O2・2.1 TFA・0.8 H2Oとしての):
計算値: C, 53.81; H, 4.88; N, 8.04。
実測値: C, 53.74; H, 4.89; N, 8.07。
【0150】
実施例18:
2−(4−エトキシベンゾイル)−N,N−ジエチル−1−イソペンチル−1H−ベンズイミダゾール−5−カルボキサミド
MnO2(0.641g、7.37ミリモル)を窒素雰囲気下乾燥ジオキサン(4ml)中の2−(4−エトキシベンジル)−N,N−ジエチル−1−イソペンチル−1H−ベンズイミダゾール−5−カルボキサミド(0.211g、0.500ミリモル)の攪拌溶液に添加した。反応混合物を50℃に加熱した。64時間後、更にMnO2(0.600g、6.90ミリモル)を添加し、加熱を更に24時間50℃で継続した。反応混合物を室温に冷却し、CH2Cl2で希釈し、珪藻土で濾過した。固体を更にCH2Cl2で十分洗浄し、濾液を濃縮して粗生成物を得た。カラムクロマトグラフィー(1:1EtOAc:ヘプタン)により精製し、粘稠な無色の油状物として標題化合物(0.139g、64%)を得た。
1H NMR (CD3OD) : δ8.19 (d, J=9.6 Hz, 2H), 7.83 (s, 1H), 7.72 (d, J=8.4 Hz, 1H),7.48 (dd, J=8.4 Hz, J=1.6 Hz, 1H), 7.01 (d, J=9.2 Hz, 2H), 4.53 (dd, J=7.6 Hz, J=7.2 Hz, 2H), 4.13 (q, J=6.4 Hz, 2H), 3.58 (br s, 2H), 3.36 (br s, 2H), 1.78-1.70 (m, 2H), 1.72-1.56 (m, 1H), 1.41 (t, J=7.2 Hz, 3H), 1.34-1.10 (2 × br s, 6H), 0.94 (d, J=6.8 Hz, 6H)。
13C-NMR (CD3OD): δ185.72,173.32,165.47,149.57,142.00,137.18,134.65,133.57,130.19,124.88,119.93,115.31,112.75,65.10,45.12,44.94,41.00,40.13,27.18,22.79,14.99,14.46,13.12。MS (ESI) (M+H)+= 436。
分析値(C26H33N3O3・0.5 H2Oとしての):
計算値: C, 70.24; H, 7.71; N, 9.45。
実測値: C, 70.40; H, 7.64; N, 8.97。
【0151】
実施例19:
2−(4−エトキシベンゾイル)−N,N−ジエチル−1−イソペンチル−1H−ベンズイミダゾール−5−カルボチオアミド
Lawesson試薬(0.0963g、0.238ミリモル)を窒素雰囲気下乾燥トルエン(5ml)中の2−(4−エトキシベンゾイル)−N,N−ジエチル−1−イソペンチル−1H−ベンズイミダゾール−5−カルボキサミド(0.0451g、0.104ミリモル)の攪拌溶液に添加した。反応混合物を0.5時間還流下に加熱し、次に室温に冷却し、濃縮した。残存物をカラムクロマトグラフィー(3:1ヘキサン:EtOAc)で精製し、ガラス上の黄色固体として標題化合物(0.0137g、29%)を得た。
1H NMR (CD3OD): δ8.19 (d, J=9.2 Hz, 2H), 7.67 (d, J=8.4 Hz, 1H), 7.64 (s, 1H), 7.36 (d, J=8.4 Hz, 1H), 7.06 (d, J=9.2 Hz, 2H), 4.55 (dd, J=8.4 Hz, J=7.2 Hz, 2H), 4.17 (q, J=7.6 Hz, 4H), 3.53 (q, J=7.6 Hz, 2H), 1.80-1.71 (m, 2H), 1.71-1.58 (m, 1H), 1.44 (t, J=7.6Hz, 3H), 1.41 (t, J=7.6Hz,3H), 1.17 (t, J=7.6Hz, 3H), 0.97 (d, J=6.4 Hz,6H)。
13C-NMR(CD3OD):δ201.23,185.95,165.57,149.55,141.87,141.18,136.28,134.64,130.31,124.56,118.20,115.41,112.36,65.15,47.48,44.89,40.18,27.20,22.77,14.95,14.07,11.44。MS (ESI) (M+H)+= 452。
分析値(C26H33N3O2S・0.3 H2Oとしての):
計算値: C, 68.33; H, 7.41; N, 9.19。
実測値: C, 68.44; H, 7.52; N, 9.01。
【0152】
実施例20:
N−シクロヘキシル−1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−N−メチル−1H−ベンズイミダゾール−5−カルボキサミド
20A:4−[(シクロプロピルメチル)アミノ]−3−ニトロベンゾニトリル
一般的操作法2Bに従い、80%水性エタノール(20mL)中の4−フルオロ−3−ニトロベンゾニトリル733mg(4.42ミリモル)を室温でシクロプロピルメチルアミン(377mg、5.3ミリモル)に添加した。混合物を3時間60℃で攪拌した後、後処理した。粗生成物(920mg、96%)を更に精製することなく次の工程に用いた。
1H-NMR (400 MHz, CDCl3) : δ8.52 (s, 1H), 8.51-8.47 (br, 1H), 7.59 (d, J=8.4 Hz,1H), 6.90 (d, J= 8.4 Hz, 1H), 3.22-3.20 (m, 2H), 1.25-1.15 (m, 1H), 0.73-0.59 (m, 2H), 0.42-0.35 (m, 2H)。MS (ESI) [2×(M+H)+] : 436。
【0153】
20B:3−アミノ−4−[(シクロプロピルメチル)アミノ]ベンゾニトリル
一般的操作法2Cに従い、粗製の4−[(シクロプロピルメチル)アミノ]−3−ニトロベンゾニトリル(920mg、4.24ミリモル)をEtOAc40ml中2時間水素化(35psi)し、得られた粗生成物750mg(95%)を更に精製することなく次の工程に用いた。MS(ESI)(M+H)+=188
【0154】
20C:1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−カルボニトリル
一般的操作法2Cに従い、新しく調製した(4−エトキシフェニル)アセチルクロリド(酸793mgより、4.4ミリモル)および粗製の3−アミノ−4−[(シクロプロピルメチル)アミノ]ベンゾニトリル(750mg、4.01ミリモル)を一夜酢酸(HOAc)中で加熱した。後処理後、粗製の残存物をシリカゲルカラムクロマトグラフィーにより精製し、オフホワイトの固体として純粋な生成物(1.04g、78%)を得た。
1H NMR (400 MHz, CDCl3) : δ8.08 (s, 1H), 7.50 (d, J=8.4 Hz, 1H), 7.38 (d, J= 8.4 Hz, 1H), 7.14 (d, J= 8.4 Hz, 2H), 6.84 (d, J= 8.4 Hz, 2H), 4.29 (s, 2H), 4.01 (d, J= 7.6 Hz, 2H), 3.96 (q, J=7.6 Hz, 2H), 1.39 (t, J= 7.6 Hz, 3H), 1.04-1.00 (m, 1H), 0.58-0.53 (m, 2H), 0.29-0.25 (m, 2H)。MS (ESI) (M+H)+= 332。
分析値(C21H21N3O・0.1 H2Oとしての):
計算値: C, 75.50; H, 6.41; N, 12.61。
実測値: C, 75.76; H, 6.72; N, 12.45。
【0155】
20D:1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−カルボン酸
1:1EtOH:H2O(16ml)中の1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−カルボニトリル(500mg、1.51ミリモル)の溶液に、KOH(338mg、6.04ミリモル)を添加した。得られた混合物を36時間還流した。混合物を1NHClでpH〜6.0まで酸性化し、沈殿を濾取し、得られた白色固体(520mg、99%)を更に精製することなく次の工程に用いた。分析上純粋な化合物は再結晶(EtOH:水より)により得た。
1H-NMR (400 MHz, CD3OD) : δ8.25 (s, 1H), 7.89 (d, J=8.4 Hz, 1H), 7.47 (d, J= 8.4 Hz, 1H), 7.18 (d, J= 8.2 Hz, 2H), 6.82 (d, J= 8.2 Hz, 2H), 4.28 (s, 2H), 4.06 (d, J= 6.8 Hz, 2H), 3.89 (q, J= 7.6 Hz, 2H), 1.32 (t, J= 7.6 Hz, 3H), 1.06-0.92 (m, 1H), 0.50-0.48 (m, 2H), 0.32-0.26 (m, 2H)。MS (ESI) (M+H)+= 351。
分析値(C21H22N2O3・0.7HClとしての):
計算値: C, 67.09; H, 6.09; N, 7.45。
実測値: C, 66.98; H, 6.31; N, 7.09。
【0156】
20E:N−シクロヘキシル−1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−N−メチル−1H−ベンズイミダゾール−5−カルボキサミド
1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−カルボン酸(80mg、0.228ミリモル)をDMF(2ml)に溶解し、次にHATU(104mg、0.274ミリモル)、次いでDIPEA(48μL、0.274ミリモル)を添加した。10分間攪拌した後、シクロヘキシルメチルアミン(0.456ミリモル)を添加し、得られた混合物を一夜攪拌した。混合物をEtOAc(50ml)で希釈し、飽和NaHCO3(2×10ml)、次いでH2O(2×10ml)で洗浄し、MgSO4上に乾燥し、濃縮し、粗製のアミドを得た。粗製の残存物をシリカゲルカラムクロマトグラフィーにより精製し、得られた純粋な生成物をジメチルエーテル中1MのHCl溶液で処理し、白色固体としてHCl塩(93mg、78%)を得た。
1H NMR (400 MHz, CD3OD) : δ 7.66 (s, 1H), 7.58 (d, J=8.0 Hz, 1H), 7.30 (d, J= 8.0 Hz, 1H), 7.16 (d, J= 8.6 Hz, 2H), 6.84 (d, J= 8.6 Hz, 2H), 4.30 (s, 2H), 4.10-4.04 (m, 5H), 3.96 (q, J= 7.6 Hz, 2H), 3.66-3.54 (m, 1H), 1.90-1.50 (m, 10H), 1.33 (t, J= 7.6 Hz, 3H), 1.10-0.98 (m, 1H), 0.50-0.42 (m, 2H), 0.32-0.27 (m, 2H)。MS (ESI) (M+H)+= 446。
分析値(C28H35N3O2・2.2HClとしての):
計算値: C, 63.96; H, 7.13; N, 7.99。
実測値: C, 64.11; H, 7.24; N, 7.73。
【0157】
実施例21:
1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−5−(1−ピロリジニルカルボニル)−1H−ベンズイミダゾール
一般的操作法20Eに従い、1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−カルボン酸(80mg、0.228ミリモル)
をDMF(2ml)に溶解し、HATU(104mg、0.274ミリモル)、次いで、DIPEA(48μL、0.274ミリモル)を添加した。10分間攪拌した後、ピロリジン(0.456ミリモル)を添加し、得られた混合物を一夜攪拌した。後処理後の粗製の残存物をシリカゲルカラムクロマトグラフィーにより精製し、得られた純粋な生成物をジエチルエーテル中1MのHCl溶液で処理することにより白色固体としてHCl塩(82mg、79%)を得た。
1H-NMR (400 MHz, CD3OD) : δ 7. 85 (s, 1H), 7.59 (d, J=8.6 Hz, 1H), 7.48 (d, J= 8.6 Hz, 1h), 7.18 (d, J= 8.1 Hz, 2H), 6.87 (d, J = 8.1 Hz, 2H), 4.32 (s, 2H), 4.07 (d, J= 6.8 Hz, 2H), 4.00 (q, J= 7.6 Hz,, 2H), 3.64 (t, J= 7.2 Hz, 2H), 3.53 (t, J= 7.2 Hz, 2H), 2.06-1.96 (m, 2H), 1.96-1.85 (m, 2H), 1.36 (t, J= 7.6 Hz, 3H), 1.10-1.04 (m, 1H), 0.52-0.46 (m, 2H), 0.34-0.28 (m, 2H)。MS (ESI) (M+H)+= 404。
分析値(C25H29N3O2・1.5 HClとしての):
計算値: C, 65.53; H, 6.71; N, 9.17。
実測値: C, 65.48; H, 6.77; N, 8.75。
【0158】
実施例22:
1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−5−(1−ピロリジニルカルボチオイル)−1H−ベンズイミダゾール
ピリジン(2ml)中の遊離塩基1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−5−(1−ピロリジニルカルボニル)−1H−ベンズイミダゾール(実施例21、80mgの1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−カルボン酸より)の溶液に、P25(507mg、1.14ミリモル)を添加した。混合物を24時間100℃に加熱し、室温に冷却した。傾瀉した後、上澄みを濃縮し、残存物をEtOAc(20ml)で希釈し、1NNaOH(2×10ml)、次いでH2O(2×10ml)で洗浄した。有機層をMgSO4上に乾燥し、蒸発させた。粗製の残存物をシリカゲルカラムクロマトグラフィーにより精製し油状物(59mg、2工程で59%)を得た。
1H NMR (400 MHz, CD3OD) : δ 7.70 (s, 1H), 7.39 (d, J=8.0 Hz, 1H), 7.28 (d, J= 8.0 Hz, 1H), 7.12 (d, J= 8.4 Hz, 2H), 6.81 (d, J= 8.4 Hz, 2H), 4.27 (s, 2H), 4.08-3.95 (m, 4H), 3.89 (d, J= 6.8 Hz, 2H), 3.57 (t, J=7.2 Hz, 2H), 2.14-2.03 (m, 2H), 2.00-1.92 (m, 2H), 1.38 (t, J= 7.2 Hz, 3H), 1.06-0.98 (m, 1H), 0.54-0.48 (m, 2H), 0.28-0.22 (m, 2H)。MS (ESI) (M+H)+= 420。
【0159】
実施例23:
1−(シクロプロピルメチル)−2−[(5−エトキシ−2−ピリジニル)メチル]−5−(1−ピロリジニルカルボニル)−1H−ベンズイミダゾール
23A:[5−(ベンジルオキシ)−2−ピリジニル]酢酸
MeOH(9ml)中の[5−(ベンジルオキシ)−2−ピリジニル]アセトニトリル(6−メチル−3−ピリジノールから6工程で得られる。W. M. Golebiewski and J. T. Wrobel, Bull. Pol. Acad. Sci., 1990, 38, 17参照)1.45g(6.46ミリモル)の溶液に25%NaOH(3ml)を添加した。反応混合物を48時間還流下に攪拌した。冷却後、MeOHの大部分を真空下に除去し、H2O(10ml)を添加し、水溶液をジエチルエーテル(2×10ml)で洗浄し、その後酸性化した(pH〜6.0)。混合物をEtOAc(3×20ml)で抽出し、MgSO4上に乾燥し、濃縮して淡黄色の結晶(1.4g、89%)を得た。MS(ESI)(M+H)+=244
【0160】
23B:2−{[5−(ベンジルオキシ)−2−ピリジニル]メチル}−1−(シクロプロピルメチル)−1H−ベンズイミダゾール−5−カルボニトリル
一般的操作法13Bに従い、[5−(ベンジルオキシ)−2−ピリジニル]酢酸360mgをHATUを用いて3−アミノ−4−[(シクロプロピルメチル)アミノ]ベンゾニトリルとカップリングさせた。得られた中間体を一夜90℃でHoAc(20ml)中で加熱した。濃縮後、粗製の残存物をシリカゲルカラムクロマトグラフィーで精製し、油状物として純粋な生成物(230mg、2工程で40%)を得た。MS(ESI)(M+H)+=395
【0161】
23C:1−(シクロプロピルメチル)−2−[(5−ヒドロキシ−2−ピリジニル)メチル]−1H−ベンズイミダゾール−5−カルボニトリル
EtOH(10ml)中の2−{[5−(ベンジルオキシ)−2−ピリジニル]メチル}−1−(シクロプロピルメチル)−1H−ベンズイミダゾール−5−カルボニトリル(200mg、0.51ミリモル)の溶液に、10%Pd/C(20mg)を添加した。混合物を一夜水素化した(40psi)。濾過し、濃縮した後、淡黄色油状物として得られた粗生成物(120mg、77%)を更に精製することなく次の工程に用いた。MS(ESI)(M+H)+=305
【0162】
23D:1−(シクロプロピルメチル)−2−[(5−エトキシ−2−ピリジニル)メチル]−1H−ベンズイミダゾール−5−カルボニトリル
DMSO(1ml)中の1−(シクロプロピルメチル)−2−[(5−ヒドロキシ−2−ピリジニル)メチル]−1H−ベンズイミダゾール−5−カルボニトリル(120mg、0.394ミリモル)の溶液にMeONa(MeOH中25%、0.47ミリモル)を添加した。30分間室温で攪拌した後、MeOHを真空下に除去し、EtI(0.47ミリモル)を添加し、得られた混合物を一夜室温で攪拌した。溶液をH2O(10ml)で希釈し、EtOAc(2×20ml)で抽出し、H2O(2×10ml)で洗浄し、最後にMgSO4上に乾燥した。蒸発後に得られた残存物をシリカゲルカラムクロマトグラフィーで精製し、油状物として純粋な生成物(84mg、64%)を得た。
1H NMR (400 MHz, CDCl3) : δ 8.19 (d, J= 3.0 Hz, 1H), 8.04 (s, 1H), 7.49 (d, J=8.4 Hz, 1H), 7.42 (d, J= 8.4 Hz, 1H), 7.24 (d, J= 8.8 Hz, 1H), 7.13 (dd, J = 10.0Hz, J= 2.8 Hz, 1H), 4.47 (s, 2H), 4.15 (d, J= 6.8 Hz, 2H), 4.04 (q, J= 7.0 Hz, 2H), 1.41 (t, J= 7.0 Hz, 3H), 1.14-1.08 (m, 1H), 0.60-0.54 (m, 2H), 0.36-0.30 (m, 2H)。MS (ESI) (M+H)+= 333。
【0163】
23E:1−(シクロプロピルメチル)−2−[(5−エトキシ−2−ピリジニル)メチル]−1H−ベンズイミダゾール−5−カルボン酸
1:1EtOH:H2O(12ml)中の1−(シクロプロピルメチル)−2−[(5−エトキシ−2−ピリジニル)メチル]−1H−ベンズイミダゾール−5−カルボニトリル(400mg、1.203ミリモル)の溶液に、KOH(269mg、4.81ミリモル)を添加した。得られた混合物を36時間還流した。混合物を1NHClでpH〜6.0に酸性化した。沈殿(397mg、94%)を更に精製することなく次の工程に用いた。MS(ESI)(M+H)+=352
【0164】
23F:1−(シクロプロピルメチル)−2−[(5−エトキシ−2−ピリジニル)メチル]−5−(1−ピロリジニルカルボニル)−1H−ベンズイミダゾール
一般的操作法20Eに従い、1−(シクロプロピルメチル)−2−[(5−エトキシ−2−ピリジニル)メチル]−1H−ベンズイミダゾール−5−カルボン酸(80mg、0.228ミリモル)をDMF(2ml)に溶解し、HATU(104mg、0.274ミリモル)し、次いでDIPEA(48μL、0.274ミリモル)を添加した。10分間攪拌した後、ピロリジンを添加し、得られた混合物を一夜攪拌した。後処理後に得られた粗製の残存物を逆相HPLCにより精製し、白色固体としてTFA塩(42mg、37%)を得た。
1H NMR (400 MHz, CD3OD): δ 8.18 (d, J= 2.8 Hz, 1H), 7.98 (d, J=9.2 Hz, 1H), 7.87 (s, 1H), 7.72 (dd, J= 9.2 Hz, J= 2.0 Hz, 1H), 7.52 (d, J= 9.2 Hz, 1H), 7.46 (dd, J= 9.2 Hz, J= 2.8 Hz, 1H), 4.89 (s, 2H), 4.43 (d, J= 6.8 Hz, 2H), 4.09 (q, J=7.2 Hz, 2H), 3.60 (t, J= 7.6 Hz, 2H), 3.44 (t, J= 7.6 Hz, 2H), 2.02-1.94 (m, 2H), 1.92-1.86 (m, 2H), 1.37 (t, J= 7.2 Hz, 3H), 1.30-1.22 (m, 1H), 0.64-0.58 (m, 2H), 0.48-0.44 (m, 2H)。 MS (ESI) (M+H)+= 405。
分析値(C24H28N4O2・0.8 TFA・0.2 H2Oとしての):
計算値: C, 55.32; H, 5.12; N, 9.49。
実測値: C, 55.30; H, 4.91; N, 9.23。
【0165】
実施例24:
1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−5−(4−モルホリニルメチル)−1H−ベンズイミダゾール
24A:1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−カルバルデヒド
50%水性ギ酸(1ml)中の1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−カルボニトリル(0.049g、0.149ミリモル)の溶液に、触媒量のラネーニッケル(水中50%懸濁液)を添加し、得られた混合物を6時間90℃に加熱した。混合物を珪藻土の短いパッドを通して濾過し、EtOAcで洗浄した。溶媒を真空下に蒸発させ、残存物をEtOAc(5ml)に溶解した。有機層を1NNaOH(2×2ml)および塩水(2ml)で洗浄し、MgSO4上に乾燥し、濾過し、真空下に濃縮した。粗生成物をシリカゲルカラムクロマトグラフィー(40%酢酸エチル/ヘキサン)により精製し、白色固体として標題化合物(0.041g、82%)を得た。
1H NMR (アセトン-d6) : δ10.16 (s, 1H), 8.29 (s, 1H), 7.90 (d, J=8.4Hz, 1H), 7.76 (d, J=8.4Hz, 1H), 7.34 (d, J=8.4Hz, 2H), 6.94 (d, J=8.4Hz, 2H), 4.44 (s, 2H), 4.24 (d, J=6.4Hz, 2H) 4.07 (q, J=6.8Hz, 2H), 1.40 (t, J=7.0Hz, 3H), 1.27-1.14 (m, 1H), 0.58-0.49 (m, 2H), 0.48-0.38 (m, 2H)。MS (ESI) (M+H)+= 335。
【0166】
24B:1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−5−(4−モルホリニルメチル)−1H−ベンズイミダゾール
テトラヒドロフラン(THF)(0.25ml)中の1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−カルバルデヒド(0.077g、0.231ミリモル)および酢酸(0.135ml、0.236ミリモル)の溶液に、ナトリウムトリアセトキシボロハイドライド(0.245g、0.268ミリモル)を添加し、得られた混合物を6時間室温で攪拌した。水(2ml)および1NHCl(5ml)を添加し、混合物を10分間攪拌した後、酢酸エチル(2×5ml)で洗浄した。水層を5NNaOH(5ml)で塩基性化し、EtOAc(3×10ml)で抽出した。合わせた有機層を塩水(5ml)で洗浄し、MgSO4上に乾燥し、濾過し、真空下に濃縮した。粗生成物をシリカゲルカラムクロマトグラフィー(5%MeOH/EtOAc)で精製し、得られた標題化合物(0.0445g、47%)をジエチルエーテル中1MのHClに溶解し、溶媒を蒸発させ、油状物のHCl塩を得た。
1H NMR (遊離塩基, CDCl3) : δ7.68 (s, 1H), 7.28-7.23 (m, 2H), 7.14 (d, J=8.4Hz, 2H), 6.81 (d, J=8.4Hz, 2H), 4.26 (s, 2H), 3.98 (q, J=7.2Hz, 2H), 3.88 (d, 6.4H),3.72-3.65 (m, 4H) 3.63 (s, 2H), 2.53-2.44 (m, 4H), 1.38 (t, J=8. 6Hz, 3H), 1.07-1.00 (m, 1H), 0.53-0.48 (m, 2H), 0.29-0.22 (m, 2H)。MS (ESI) (M+H)+= 406。
【0167】
実施例25:
1−[1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル]エタノン
25A:1−[1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル]エタノール
0℃のTHF(60ml)中の1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−カルバルデヒド(2.32g、6.94ミリモル)の溶液に、THF中3Mの臭化メチルマグネシウム(13.9ml、41.7ミリモル)を添加し、得られた混合物を90分間0℃で攪拌した。水(50ml)を添加し、混合物を10分間攪拌した後に、EtOAc(3×10ml)で抽出した。合わせた有機層を塩水(50mL)で洗浄し、MgSO4上に乾燥し、濾過し、真空下に濃縮した。粗生成物にCH2Cl2(5ml)を添加し、得られた懸濁液を濾過し、固体をCH2Cl2(2ml)で洗浄し、乾燥し、乾燥し、白色固体として標題化合物(1.915g、75%)を得た。
1H NMR (CDCl3): 7.74 (s, 1H), 7.31 (s, 2H), 7.12 (d, J=8.4Hz, 2H), 6.79 (d, J=8.0Hz, 2H), 5.03 (q, J=6.3Hz, 2H), 4.27 (s, 2H), 3.98 (q, J=6.8Hz, 2H) 3.90 (d, J=6.4Hz, 2H), 2.33 (br s, 1H), 1.56 (dj J=6.4Hz, 3H), 1.38 (t, J=7.0Hz, 3H), 1.05-0.99 (m, 1H), 0.53-0.48 (m, 2H), 0.26-0.23 (m, 2H)。MS (ESI) (M+H)+= 351。
分析値(C22H26N2O2としての):
計算値: C, 75.40; H, 7.48; N, 7.99。
実測値: C, 75.22; H, 7.32; N, 7.99。
【0168】
25B:1−[1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル]エタノン
CH2Cl2(10ml)中の1−[1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル]エタノール(1.35g、3.86ミリモル)、N−メチルモルホリン−N−オキシド(0.497g、4.24ミリモル)および4Åのモレキュラーシーブ(2.0g)の混合物に、テトラプロピルアンモニウムパールテネート(0.068g、0.193ミリモル)を添加し、得られた混合物を90分間室温で攪拌した。N−メチルモルホリン−N−オキシド(0.124g、1.06ミリモル)およびアセトニトリル(1ml)を添加し、混合物を一夜室温で攪拌した。溶媒を真空下に濃縮し、粗生成物をシリカゲルカラムクロマトグラフィー(30%EtOAc/ヘキサン〜60%EtOAc/ヘキサン)で精製し、白色固体として標題化合物(0.880g、65%)を得た。
1H-NMR (CDCl3) : δ 8.34 (s, 1H), 7.94 (dd, J=8.4 Hz, J=2.0 Hz, 1H), 7.35 (d, J= 8.4 Hz, 1H), 7.15 (d, J = 8.4 Hz, 2H), 6.91 (dd, J = 6.4 Hz, J = 2.0 Hz, 2H),4.29 (s, 2H), 3.98 (q, J = 7.2 Hz, 2H) 3.41 (d, J = 6.8 Hz, 2H), 2.67 (s, 3H), 1.38 (t, J = 7.0 Hz, 3H), 1.07-1.00 (m, 1H), 0.55-0.51 (m, 2H), 0.29-0.26 (m, 2H)。
13C-NMR (CDCl3) : δ 198.71,159.01,156.43,143.29,140.01,132.68,130.44,128.67,123.50,121.95,115.83,110.73,64.38,49.23,34.63,27.63,15.76,11.99,5.20。MS (ESI) (M+H)+= 349。
分析値(C22H24N2O2+ 0.1 H2Oとしての):
計算値: C, 75.44; H, 6.96; N, 8.00。
実測値: C, 75.48; H, 7.13; N, 8.01。
【0169】
実施例26:
メチル−1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イルカーバメート
26A:メチル4−フルオロ−3−ニトロフェニルカーバメート
CH2Cl2(150ml)中の4−フルオロ−3−ニトロアニリン(10.30g、65.97ミリモル)、DIPEA(15.00mL、86.11ミリモル)の攪拌溶液に、クロロギ酸メチル(6.86g、72.59ミリモル)を0℃で滴加した。反応混合物を室温に戻し、次に一夜室温で攪拌した。混合物をCH2Cl2(100ml)で希釈し、3NHCl(50ml)、塩水(20ml)で洗浄し、硫酸ナトリウム上に乾燥した。溶媒を除去し、明茶色の固体として粗製のカーバメートを得た(13.03g、92%)。
【0170】
26B:メチル4−[(シクロプロピルメチル)アミノ]−3−ニトロフェニルカーバメート
一般的操作法2Bに従い、80%水性エタノール(100ml)中のメチル4−フルオロ−3−ニトロフェニルカーバメート(6.50g、30.35ミリモル、前工程より)の溶液にシクロプロパンメチルアミン(5.00ml、57.65ミリモル)を室温で添加した。反応混合物を一夜60℃で加熱した。通常の後処理の後、析出した粗生成物を収集した(8.21g)。MS(ESI)(M+H)+=266
【0171】
26C:メチル3−アミノ−4−[(シクロプロピルメチル)アミノ]フェニルカーバメート
一般的操作法2Cに従い、メチル4−[(シクロプロピルメチル)アミノ]−3−ニトロフェニルカーバメート(8.21g)を1時間15〜25psiの水素圧で10%Pd/C(500mg)で触媒しながら酢酸エチル(100ml)中で水素化した。反応混合物を珪藻土で濾過し、溶媒を除去し、所望のジアミン(4.0g、2工程で56%)を得た。この物質は更に精製することなく次の工程に用いた。MS(ESI)(M+H)+=236
【0172】
26D:メチル−1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イルカーバメート
一般的操作法13Bに従い、メチル3−アミノ−4−[(シクロプロピルメチル)アミノ]フェニルカーバメート(4.0g、17.0ミリモル)、DIPEA(5ml)、4−エトキシフェニル酢酸(3.06g、17.0ミリモル)およびHATU(7.10g、18.7ミリモル)を合わせた。所望の生成物(3.34g、52%)を反応混合物から析出させた。
1H-NMR(CDCl3): δ7.65 (d, J = 2.0 Hz, 1H), 7.37 (br., 1H), 7.26 (d, J = 4 Hz),7.12 (d, J = 9.0 Hz, 2H), 6.81 (d, J = 9.0 Hz, 2H), 6.74 (br., 1H), 4.25 (s, 2H), 3.98 (q, J = 7.4 Hz, 2H), 3.87 (d, J = 7.2 Hz, 2H), 3.79 (s, 3H), 1.38 (t, J = 7.4 Hz, 3H), 1.05-0.97 (m, 1H), 0.52-0.47 (m, 2H), 0.25-0.20 (m, 2H)。MS (ES (M+H)+= 380。
【0173】
実施例27:
N−[1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル]−N,5−ジメチル−3−イソキサゾールカルボキサミド
27A:1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−N−メチル−1H−ベンズイミダゾール−5−アミン
0℃のTHF(30ml)中、濃H2SO4(0.80g、8.10ミリモル)を1M LiAlH4 THF溶液(16ml、16ミリモル)に滴加することにより新しく調製したAlH4の冷(0℃)溶液(〜3M)にメチル−1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イルカーバメート(1.65g、4.35ミリモル)を少しづつ添加した。反応混合物を一夜室温で攪拌し、その後EtOAc(5ml)、H2O(3ml)およびEt2O(100ml)、その後、Na2SO4・5H2O(10g)を慎重に添加することによりクエンチングした。反応混合物を透明な溶液が形成されるまで攪拌し、固体を濾去した。濾液をNa2SO4上に乾燥し、真空下に濃縮し、所望の化合物(1.21g)を得た。粗生成物を更に精製することなく次の工程に付した。
【0174】
27B:N−[1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル]−N,5−ジメチル−3−イソキサゾールカルボキサミド
CH2Cl2(5ml)中の1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−N−メチル−1H−ベンズイミダゾール−5−アミン(100mg、0.30ミリモル)およびEt3N(200mg、0.20ミリモル)の溶液に、5−メチル−3−イソキサゾールカルボニルクロリド(0.1ml)を室温で添加した。反応混合物を一夜室温で攪拌し、飽和NaHCO3(1ml)でクエンチングした。混合物をEt2O(30ml)で希釈し、飽和NaHCO3、次いで塩水で洗浄し、最後にNa2SO4上に乾燥した。濃縮後、得られた残存物を分取HPLCにより精製し、TFA塩として所望の物質を得た(40mg、24%)。TFA塩をH2O(10ml)に溶解し、飽和NaHCO3で中和し、Et2O(2×20ml)で抽出した。合わせたエーテル性溶液を塩水で洗浄し、Na2SO4上に乾燥し、濃縮した。遊離の塩基をそのHCl塩に変換した(20mg)。
1H-NMR(CD3OD) : δ7.86 (br., 1H), 7.62 (br., 1H), 7.45 (br., 1H), 7.24 (d, J =8.4 Hz, 2H), 6.93 (d, J = 8.4 Hz, 2H), 4.53 (s, 2H), 4.34 (d, J = 6.8 Hz, 2H), 4.00 (q, J = 7.0 Hz, 2H), 3.50 (s, 3H), 2.26 (s, 3H), 1.34 (t, J = 7.0 Hz, 3H), 1.26-1.16 (m, 1H), 0.62-0.55 (m, 2H), 0.46-0.40 (m, 2H)。MS (ESI) (M+H)+= 445。分析値(C26H28N403・1.15 HClとしての):
計算値: C, 64.19; H, 5.92; N, 11.51。
実測値: C, 64.59; H, 5.74; N, 10.97。
【0175】
実施例28:
イソプロピル−1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル−メチル)カーバメート
CH2Cl2(3ml)中の1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−N−メチル−1H−ベンズイミダゾール−5−アミン(67mg、0.20ミリモル)およびEt3N(0.1ml)の溶液に、室温でイソプロピルクロロホルメート(トルエン中1M、0.24ml、0.24ミリモル)を添加した。反応混合物を一夜室温で攪拌し、飽和NaHCO3(1ml)でクエンチングした。混合物をEt2O(30ml)で希釈し、飽和NaHCO3および塩水で洗浄し、Na2SO4上に乾燥し、濃縮した。得られた残存物を分取HPLCで精製し、TFA塩を得た(10mg、9%)。
1H NMR (CD3OD): δ 7.87 (d, J = 8.4 Hz, 1H), 7.62 (d, J = 1.6 Hz, 1H), 7.50 (dd,J = 1.6, 8.4 Hz, 1H), 7.24 (d, J = 8.4 Hz, 2H), 6.93 (d, J = 8.4 Hz, 2H), 4.95-4.85 (m, 1H), 4.54 (s, 2H), 4.35 (d, J = 7.2 Hz, 2H), 4.01 (q, J = 6.8 Hz, 2H), 3.31 (s, 3H), 1.343 (t, J = 6.8 Hz, 3H), 1.27-1.19 (m, 1H), 1.19 (d, J = 5.6 Hz,6H), 0.63-0.56 (m, 2H), 0.47-0.42 (m, 2H)。MS (ESI) (M+H)+= 422。
分析値(C25H31N3O3・1.35 TFA・0.05 H2Oとしての):
計算値: C, 57.72; H, 5.67; N, 7.29。
実測値: C, 57.68; H, 5.33; N, 7.23。
【0176】
実施例29:
(2S)−N−[1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル]−N,1−ジメチル−2−ピロリジンカルボキサミド DMF(3ml)中の1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−N−メチル−1H−ベンズイミダゾール−5−アミン(80mg、0.62ミリモル)の溶液に、DIPEA(0.2ml)および(2S)−1−メチル−2−ピロリジンカルボン酸(80mg、0.62ミリモル)を添加した。反応混合物を5分間室温で攪拌し、次にHATU(280mg、0.73ミリモル)を添加した。次に反応混合物を一夜室温で攪拌した。飽和NaHCO3(1ml)およびH2O(20ml)を添加し、混合物をEtOAc(2×20ml)で抽出した。合わせた抽出液を飽和NaHCO3(5ml)および塩水で洗浄し、Na2SO4上に乾燥し、真空下に濃縮し、得られた粗製のアミンを分取HPLCで精製し、TFA塩を得た(18mg、13%)。MS(ESI)(M+H)+=447。
【0177】
実施例30:
1−t−ブチル−N−[1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル]−N−メチル尿素
t−ブチルイソシアネート(0。1ml)をエチレンクロリド(5ml)中の1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−N−メチル−1H−ベンズイミダゾール−5−アミン(34mg、0.10ミリモル)の溶液に添加し、次に反応混合物を一夜60℃に加熱した。粗生成物をシリカゲル上のフラッシュクロマトグラフィー(EtOAc)により精製し、所望の尿素(26mg、59%)を得た。
1H-NMR (CDCl3) : 遊離塩基 δ 7.61 (d, J = 2.0 Hz, 1H), 7.33 (d, J = 8.4 Hz, 1H),7.16 (d, J = 8.4 Hz, 2H), 7.10 (dd, J = 2.0, 8.4 Hz, 1H), 6.83 (d, J = 8.4 Hz, 2H), 4.28 (s, 1H), 4.27 (s, 2H), 4.00 (q, J = 7.0 Hz, 2H), 3.93 (d, J = 6.8 Hz, 2H), 3.26 (s, 3H), 1.40 (t, J = 7.0 Hz, 3H), 1.28-1.20 (m, 1H), 1.25 (s, 9H), 0.58-0.53 (m, 2H), 0.31-0.26 (m, 2H)。MS (ESI) (M+H)+= 435。HCl塩はジエチルエーテル中のHClを用いて調製した。
分析値(C26H34N4O2・1.20 HC1・1.10 C2H6Oとしての):
計算値: C, 64.03; H, 7.96; N, 10.59。
実測値: C, 64.10; H, 7.53; N, 10.30。
【0178】
実施例31:
N−[1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル]−N1−(2−メトキシフェニル)−N−メチルチオ尿素
1−イソチオシアナト−2−メトキシベンゼン(100mg、0.61ミリモル)をDMF(5ml)中の1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−N−メチル−1H−ベンズイミダゾール−5−アミン(100mg、0.30ミリモル)の溶液に添加した。反応混合物を一夜50℃に加熱した。溶媒を除去した後に単離された粗生成物をシリカゲル上のクロマトグラフィー(EtOAc/CH2Cl21:1)で精製し、所望の生成物(85mg、57%)を得た。
1H NMR (CDCl3) : 遊離塩基δ 8.26 (dd, J = 2.0, 8.4 Hz, 1H), 7.74 (d, J = 2.0 Hz,1H), 7.50 (s, 1H), 7.43 (d, J = 8.4 Hz, 1H), 7.20 (dd, J = 1.6, 8.4 Hz, 1H), 7.15 (d, J = 8.4 Hz, 2H), 7.08-7.02 (m, 1H), 6.98-6.92 (m, 1H), 6.83 (d, J = 8.4 Hz, 2H), 6.75 (d, J = 8.4 Hz, 1H), 4.29 (s, 2H), 4.00 (q, J = 7.0 Hz, 2H), 3.96 (d, J = 6.8 Hz, 2H), 3.80 (s, 3H), 3.58 (s, 3H), 1.37 (t, J = 7.0 Hz, 3H), 1.10-1.00 (m, 1H), 0.59-0.52 (m, 2H), 0.32-0.25 (m, 2H)。MS (ESI) (M+H)+= 501。
【0179】
実施例32:
N−アリル−N−[1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル]アセトアミド
32A:N−(4−フルオロ−3−ニトロフェニル)アセトアミド
4−フルオロ−3−ニトロ−アニリン(45.0g)を室温で無水酢酸(150ml)に少しづつ添加した。反応混合物を2時間室温で攪拌した。所望の生成物が沈殿し、これを収集し、真空下に乾燥した(42.0g、70%)。
【0180】
32B:N−{4−[(シクロプロピルメチル)アミノ]−3−ニトロフェニル}アセトアミド
一般的操作法2Bに従い、80%エタノール水溶液(150ml)中のN−(4−フルオロ−3−ニトロフェニル)アセトアミド(15.4g、77.7ミリモル)の溶液に、室温でシクロプロパンメチルアミン(10ml)を添加した。反応混合物を一夜還流下に加熱した。室温に冷却した後、H2O(300ml)を添加し、所望の生成物を橙色固体(18g、92%)として析出させた。
【0181】
32C:N−{3−アミノ−4−[(シクロプロピルメチル)アミノ]フェニル}アセトアミド
一般的操作法2Cに従い、N−{4−[(シクロプロピルメチル)アミノ]−3−ニトロフェニル}アセトアミド(7.0g、28ミリモル)をParr振とう機中25psiの水素圧力下に10%Pd/C(0.8g)を用いて、酢酸エチル(300ml)中で水素化した。後処理後、所望の生成物を単離した(5.5g、89%)。
【0182】
32D:N−[1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル]アセトアミド
一般的操作法13Bに従い、DMF(100ml)中のN−{3−アミノ−4−[(シクロプロピルメチル)アミノ]フェニル}アセトアミド(5.50g、25.11ミリモル)、DIPEA(6.50ml、37.5ミリモル)、4−エトキシフェニル酢酸(5.40、30.0ミリモル)およびHATU(11.40g、30.0ミリモル)を一夜室温で攪拌した。所望の生成物を単離した(4.5g、86%)。
1H-NMR(CD3OD) : δ 7.89 (s, 1H), 7.44-7.36 (m, 2H), 7.13 (d, J = 8.4 Hz, 2H), 6.83 (d, J = 8.4 Hz, 2H), 4.25 (s, 2H), 4.03-3.94 (m, 4H), 2.14 (s, 3H), 1.34 (t, J = 7.0 Hz, 3H), 1.06-0.96 (m, 1H), 0.48-0.41 (m, 2H), 0.29-0.22 (m, 2H)。MS (ESI) (M+H)+= 364。
分析値(C22H25N302・1.5H2Oとしての):
計算値: C, 67.67; H, 7.23; N, 10.76。
実測値: C, 67.50; H, 7.12; N, 10.65。
【0183】
32E:N−アリル−N−[1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル]アセトアミド
臭化アリル(0.3ml)を窒素下室温でCH2Cl2(15ml)中の50%KOH(50ml)、N−[1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル]アセトアミド(545mg、1.50ミリモル)およびn−Bu4NBr(64mg、0.2ミリモル)の十分攪拌された2層の溶液に添加した。反応混合物を2時間室温で攪拌し、次にH2O(30ml)で希釈し、CH2Cl2(2×50ml)で抽出した。抽出液を合わせ、飽和NaHCO3、塩水で洗浄し、Na2SO4上に乾燥した。溶媒を除去し、得られた黄色味を帯びた残存物(530mg)をシリカゲル上のフラッシュクロマトグラフィー(MeOH/CH2Cl2、1:10)により精製し、生成物を得た(510mg、84%)。
1HNMR (CDCl3) : δ 7.54 (d, J = 2.0 Hz, 1H), 7.31 (d, J = 8.4 Hz, 1H), 7.16 (d, J = 8.4 Hz, 2H), 7.02 (dd, J = 2.0,8.4 Hz, 1H), 6.84 (d, J = 8.4 Hz, 2H), 5.98-5.84 (m, 1H), 5.12-5.04 (m,2H), 4.34 (d, J = 5.6 Hz, 2H), 4.27 (s, 2H), 4.01 (q, J = 7.6 Hz, 2H), 3.93 (d, J = 6.4 Hz, 2H),1.88 (s, 3H), 1.39 (t, J = 7.6 Hz, 3H), 1.10-1.00 (m, 1H), 0.59-0.52 (m, 2H), 0.31-0.26 (m, 2H)。MS (ESI) (M+H)+= 404。HCl塩はジエチルエーテル中のHClを用いて調製した。
分析値(C25H29N3O2・HC1・1.5H2Oとしての):
計算値: C, 64.24; H, 7.07; N, 8.99。
実測値: C, 63.96; H, 6.80; N, 8.84。
【0184】
実施例33:
N−アリル−1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−アミン
EtOH(20ml)中のN−アリル−N−[1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル]アセトアミド(510mg)の溶液に20%KOH(20ml)を添加した。反応混合物を一夜還流下に加熱し、次に室温に戻した。混合物を真空下に濃縮して約20mlとし、CH2Cl2(2×100ml)で抽出した。合わせた抽出液を塩水で洗浄し、Na2SO4上に乾燥し、真空下に濃縮した。残存物をシリカゲル上のクロマトグラフィー(CH2Cl2/MeOH25:1)により精製し、明黄色の油状物を得た(400mg、87%)。
1H NMR (CD3OD) : δ 8.03 (br., 1H), 7.64 (br., 1H), 7.54 (br., 1H), 7.28 (d, J =8.4 Hz, 2H),6.96 (d, J = 8.4 Hz, 2H), 6.03-5.92 (m, 1H), 5.43 (d, J =24.8 Hz, 1H), 5.40 (d, J = 18.8 Hz, 1H), 4.59 (s, 2H), 4.41 (d, J = 7.6 Hz, 2H), 4.04 (d, J = 6.4 Hz, 2H), 4.03 (q, J = 6.4 Hz, 2H), 1.36 (t, J = 6.4 Hz, 3H), 1.30-1.18 (m, 1H), 0.66-0.58 (m, 2H), 0.50-0.42 (m, 2H)。MS (ESI) (M+H)+= 362。HCl塩はジエチルエーテル中のHClを用いて調製した。
分析値(C23H27N3O・2HC1・1.25H2Oとしての):
計算値:C, 60.46; H, 6.89; N, 9.19。
実測値: C, 60.53; H, 6.64; N, 8.89。
【0185】
実施例34:
1−[1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル]−2−ピロリジノン
34A:1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−アミン
1:120%KOH:EtOH(20ml)中のN−[1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル]アセトアミド(727mg、2ミリモル)の溶液を一夜還流下に攪拌した。冷却後、混合物を1NHClでpH〜6.0まで酸性化し、沈殿を濾取し、淡黄色の固体611mg(95%)として所望の生成物を得た。MS(ESI)(M+H)+=322。
【0186】
34B:1−[1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−イル]−2−ピロリジン
CH2Cl2(3ml)中の1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−アミン(72mg、0.22ミリモル)およびDIPEA(150μM)に4−ブロモブチルクロリド(40μL、0.35ミリモル)を添加した。反応混合物を3時間室温で攪拌し、次に50%KOH(3ml)およびn−Bu4NBr(5mg)を反応混合物に添加した。反応混合物を4時間激しく攪拌し、H2O(10ml)で希釈し、CH2Cl2(2×20ml)で抽出した。合わせた抽出液をH2O、次いで塩水で洗浄し、Na2SO4上に乾燥し、真空下に濃縮し、得られた粗製のラクタムを分取TLC、その後、分取HPLCで精製し、TFA塩として所望の生成物を得た(11mg、10%)。
1H-NMR(CD3OD) : δ8.14 (d, J = 2.0 Hz, 1H), 7.91 (d, J=9.2Hz, lH), 7.80 (dd, J = 2.0, 9.2 Hz, 1H), 7.26 (d, J = 9.2 Hz, 2H), 6.95 (d, J = 9.2 Hz, 2H), 4.56 (s, 2H), 4.37 (d, J = 6.4 Hz, 2H), 4.03 (t, J = 7.6Hz, 2H), 4.01 (q, J = 6.8 Hz, 2H), 2.63 (t, J = 8.4 Hz, 2H), 2.20 (tt, J = 7.6, 8.4 Hz, 2H), 1.36 (t, J = 6.8 Hz, 3H), 1.28-1.18 (m, 1H), 0.64-0.57 (m, 2H), 0.49-0.42 (m, 2H)。MS (ESI) (M+H)+= 390。
分析値(C24H27N3O2・TFA・0.1H2Oとしての):
計算値: C, 61.80; H, 5.63; N, 8.32。
実測値: C, 61.75; H, 5.30; N, 7.99。
【0187】
実施例35:
3−(シクロプロピルメチル)−2−(4−エトキシベンジル)−N,N−ジエチル−3H−イミダゾ[4,5−b]ピリジン−6−カルボキサミド
35A:6−[(シクロプロピルメチル)アミノ]−5−ニトロニコチン酸
シクロプロパンメチルアミン(1.70g、23.90ミリモル)を室温でMeOH(25ml)中の6−クロロ−5−ニトロニコチン酸(1.12g、5.53ミリモル)の溶液に添加した。反応混合物を2時間室温で攪拌し、真空下に濃縮した。残存物をH2O(20ml)に溶解し、pH=3となるまで3NHClを添加することにより溶液を酸性化した。混合物をEtOAcおよびCH2Cl2(2×100ml)で抽出し、合わせた抽出液を塩水で洗浄し、Na2SO4上に乾燥し、真空下に濃縮し、得られた明黄色の固体(1.30g)を更に精製することなく次の反応に用いた。
【0188】
35B:メチル6−[(シクロプロピルメチル)アミノ]−5−ニトロニコチネート
6−[(シクロプロピルメチル)アミノ]−5−ニトロニコチン酸(1.30g)をMeOH/トルエン(1:1、60ml)に溶解し、TMSCHN2(ヘキサン中2M、6ml)を滴加した。反応混合物を一夜室温で攪拌し、真空下に濃縮し、得られた粗製のメチルエステル(1.5g)を更に精製することなく次の工程に用いた。
【0189】
35C:メチル5−アミノ−6−[(シクロプロピルメチル)アミノ]ニコチネート
一般的操作法2Cに従い、メチル6−[(シクロプロピルメチル)アミノ]−5−ニトロニコチネート(1.5g)を2時間Parr振とう機中20psiの水素圧力下に10%Pd/C(100mg)を用いて、酢酸エチル(50ml)中で水素化した。反応混合物を珪藻土で濾過し、溶媒を除去し、得られたジアミン(1.12g)を更に精製することなく次の工程に用いた。
【0190】
35D:メチル3−(シクロプロピルメチル)−2−(4−エトキシベンジル)−3H−イミダゾ[4,5−b]ピリジン−6−カルボキシレート
一般的操作法13Bに従い、DMF(15ml)中、メチル5−アミノ−6−[(シクロプロピルメチル)アミノ]ニコチネート (950mg、〜4.3ミリモル)、DIPEA(1.1lm)、4−エトキシフェニル酢酸(850mg、4.72ミリモル)およびHATU(1.80、4.74ミリモル)を合わせた。粗生成物をシリカゲル上のフラッシュクロマトグラフィー(EtOAc)で精製し、所望の生成物を得た(530mg、34%)。
1HNMR (CDCl3) : δ 9.00 (d, J = 2.0 Hz, 1H), 8.61 (d, J = 2.0 Hz, 1H), 7.17 (d, J =8.0 Hz, 2H), 6.84 (d, J = 8.0 Hz, 2H), 4.33 (s, 2H), 4.06 (d, J = 7.2 Hz, 2H), 4.00 (q, J = 7.0 Hz, 2H), 3.97 (s, 3H), 1.39 (t, J = 7.0 Hz, 3H), 1.16-1.06 (m, 1H), 0.52-0.45 (m, 2H), 0.44-0.38 (m, 2H)。
【0191】
35E:3−(シクロプロピルメチル)−2−(4−エトキシベンジル)−3H−イミダゾ[4,5−b]ピリジン−6−カルボン酸
THF/MeOH(1:1、6ml)中のメチル3−(シクロプロピルメチル)−2−(4−エトキシベンジル)−3H−イミダゾ[4,5−b]ピリジン−6−カルボキシレート(260mg、0.71ミリモル)の溶液に、1NNaOH(3ml、3ミリモル)を添加した。反応混合物を3時間室温で攪拌し、真空下に濃縮した。残存物をH2O(10ml)に溶解し、pH=5となるまで1NHCl溶液を添加することにより酸性化した。固体を収集し(230mg)、濾液をEtOAc(2×50ml)で抽出した。抽出液をNa2SO4上に乾燥し、真空下に濃縮し、更に生成物(20mg)を得た。所望の酸は定量的な収率で生成された。
1H NMR (CD3OD): δ 8.93 (d, J = 1.6 Hz, 1H), 8.50 (d, J = 1.6 Hz, 1H), 7.15 (d, J = 9.2 Hz,2H), 6.82 (d, J=9.2 Hz, 2H), 4.33 (s, 2H), 4.11 (d, J=6.4 Hz, 2H), 3.95 (q, J = 7.2 Hz, 2H), 1.31 (t, J = 7.2 Hz, 3H), 1.16-1.03 (m, 1H), 0.43-0.32 (m, 4H)。
【0192】
35F:3−(シクロプロピルメチル)−2−(4−エトキシベンジル)−N,N−ジエチル−3H−イミダゾ[4,5−b]ピリジン−6−カルボキサミド
DMF(5ml)中の3−(シクロプロピルメチル)−2−(4−エトキシベンジル)−3H−イミダゾ[4,5−b]ピリジン−6−カルボン酸(150mg、0.43ミリモル)の攪拌溶液に、DIPEA(0.12ml、0.69ミリモル)およびジエチルアミン(60μl、0.58ミリモル)を添加した。反応混合物を5分間室温で攪拌し、次にHATU(200mg、0.53ミリモル)を添加した。反応混合物を室温で一夜攪拌し、その後攪拌しながら氷水(20ml)に注ぎ込んだ。混合物をEtOAc(100ml)で抽出し、抽出液をH2O(20ml)で洗浄し、Na2SO4上に乾燥し、真空下に濃縮した。残存物をシリカゲル上のフラッシュクロマトグラフィー(EtOAc/MeOH、20:1)で精製し、得られた所望のアミド(115mg、64%)を共溶媒としてメタノールを用いながらジエチルエーテル中HClを用いて相当するHCl塩に変換した。
1HNMR (CD3OD): δ 8.46 (d, J = 2.0 Hz, 1H), 8.04 (d, J = 2.0 Hz, 1H), 7.21 (d, J= 8.4 Hz, 2H), 6.88 (d, J = 8.4 Hz, 2H), 4.46 (s, 2H), 4.24 (d, J = 7.2 Hz, 2H), 3.98 (q, J = 7.0 Hz, 2H), 3.57 (br, 2H), 3.32 (br, 2H), 1.33 (t, J = 7.0 Hz, 3H), 1.32-1.10 (m, 7H), 0.56-0.44 (m, 4H)。MS (ESI) (M+H)+= 423。
分析値(C24H30N4O2・HC1・0.20 CH3OHとしての):
計算値: C, 64.68; H, 7.07; N, 12.48。
実測値: C, 65.07; H, 7.13; N, 12.13。
【0193】
実施例36:
N−シクロペンチル−1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−スルホンアミド
36A:1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−スルホニルクロリド
濃HCl(0.6ml)およびHOAc(0.18ml)の混合物に1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−アミン(193mg、0.6ミリモル)を添加した。得られた混合物を−10℃未満に冷却し、次にH2O(0.065ml)中のNaNO2(44.8mg、0.65ミリモル)の溶液をゆっくり添加し、混合物を45分間−10℃〜−5℃の温度で攪拌した。別のフラスコにおいて、SO2を酢酸(0.6ml)中に30分間バブリングした。CuCl(15mg)を添加し、黄緑色の懸濁液が青緑色になるまで更にSO2をバブリングした。次に銅を含有する溶液を10℃未満に冷却し、ジアゾ化された混合物を攪拌しながら滴加した。全てのジアゾニウム塩を添加下後、混合物を氷水(1:1、4ml)に注ぎ込み、次にジクロロメタン(3×15ml)で抽出し、H2O(2×10ml)で洗浄し、MgSO4上に乾燥し、濃縮して得られた黄色油状物(190mg、78%)を更に精製することなく形成直後に次反応において使用した。MS(ESI)(M+H)+=405。
【0194】
36B:N−シクロペンチル−1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−スルホンアミド
ジクロロメタン(4ml)中の1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−スルホニルクロリド(アニリン前駆体0.2ミリモルより)の粗製の溶液にシクロペンチルアミン(0.4ミリモル)、次いでピリジン(0.5ml)を添加した。得られた混合物を一夜室温で攪拌した。水(10ml)を添加し、混合物をCH2Cl2(2×10ml)で抽出し、MgSO4上に乾燥し、濃縮した。残存物をシリカゲルカラムクロマトグラフィーで精製し、得られた純粋な生成物をジエチルエーテル中1MのHCl溶液で処理し、HCl塩を形成した(62mg、81%)。
1H NMR (400 MHz,CD3OD) : δ8.29 (s, 1H), 7.78 (d, J=8.0 Hz, 1H), 7.42 (d, J= 8.0 Hz, 1H), 7.16 (d, J= 8.4 Hz, 2H), 6.84 (d, J= 8.4 Hz, 2H), 4.32 (s, 2H), 4.02-3.94 (m, 4H), 3.62-3.58 (m, 1H), 1.80-1.74 (m, 2H), 1.64-1.56 (m, 2H), 1.50-1.42(m, 2H), 1.39 (t, J= 8.2 Hz, 3H), 1.42-1.34 (m, 2H), 1.08-1.00 (m, 1H), 0.58-0.54 (m, 2H), 0.30-0.25 (m, 2H)。MS (ESI) (M+H)+= 454。
分析値(C25H31N3O3S・0.3HClとしての):
計算値: C, 64.64; H, 6.79; N, 9.05。
実測値 : C, 64.45; H, 6.97; N, 8.66。
【0195】
実施例37:
1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−5−[(4−メチル−1−ピペラジニル)スルホニル]−1H−ベンズイミダゾール
一般的操作法36Bに従い、CH2Cl2(4ml)中の1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−スルホニルクロリド(アニリン前駆体0.2ミリモルより)、1−メチルピペラジン(0.4ミリモル)、ピリジン(0.5ml)を用いた。得られた混合物を一夜室温で攪拌した。カラムクロマトグラフィーおよびジエチルエーテル中1MのHCl溶液で処理した後HCl塩として所望の生成物を単離した(59mg、75%)。
1H NMR (400 MHz, CD3OD) : δ8.02 (s, 1H), 7.71 (d, J=8.6 Hz, 1H), 7.64 (d, J= 8.6 Hz, 1H), 7.13 (d, J= 8.8 Hz, 2H), 6.83 (d, J= 8.8 Hz, 2H), 4.80 (s, 3H), 4.31 (s, 2H), 4.10 (d, J= 7.2 Hz, 2H), 3.95 (q, J= 8.0 Hz, 2H), 3.04-2.96 (m, 4H), 2.50-2.44 (m, 4H), 1.32 (t, J= 8.0 Hz, 3H), 1.08-0.98 (m, 1H), 0.47-0.43 (m, 2H), 0.31-0.26 (m, 2H)。MS (ESI) (M+1)+:469。
分析値(C25H32N4O3S・2.7HC1・0.4H2Oとしての):
計算値: C, 52.29; H, 6.23; N, 9.76。
実測値: C, 52.54; H, 6.21; N, 8.67。
【0196】
実施例38:
1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−N−エチル−1H−ベンズイミダゾール−5−スルホンアミド
一般的操作法36Bに従い、
CH2Cl2(4ml)中の1−(シクロプロピルメチル)−2−(4−エトキシベンジル)−1H−ベンズイミダゾール−5−スルホニルクロリド(アニリン前駆体0.2ミリモルより)、エチルアミン(THF中2M溶液、0.4ミリモル)およびピリジン(0.5ml)を用いた。得られた混合物を一夜室温で攪拌した。カラムクロマトグラフィーおよびジエチルエーテル中1MのHCl溶液で処理した後HCl塩として所望の生成物を単離した(61mg、87%)。
1H NMR (400 MHz, CD3OD): δ8.28 (s, 1H), 7.78 (d, J=8.0 Hz, 1H), 7.42 (d, J= 8.0Hz, 1H), 7.15 (d, J= 8.8 Hz, 2H), 6.83 (d, J= 8.8 Hz, 2H), 4.32 (s, 2H), 4.02-3.93 (m, 4H), 3.06-2.98 (m, 2H), 1.38 (t, J= 7.6 Hz, 3H), 1.10 (t, J= 8.0 Hz, 3H), 1.07-1.00 (m, 1H), 0.55-0.52 (m, 2H), 0.30-0.24 (m, 2H)。MS (ESI) (M+H)+= 414。
分析値(C22H27N3O3S・ 1.1HC1としての):
計算値: C, 58.25; H, 6.24; N, 9.26。
実測値: C, 58.19; H, 6.73; N, 8.62。
【0197】
実施例39:
2−(4−エトキシアニリノ)−N,N−ジエチル−1−イソペンチル−1H−ベンズイミダゾール−5−カルボキサミド
DMF(0.2ml)中のメチル4−エトキシフェニルジチオカーバメート(0.0274g、0.121ミリモル)の溶液をDMF(0.2ml)中の3−アミノ−N,N−ジエチル−4−(イソペンチルアミノ)ベンズアミド(0.0334g、0.12ミリモル)および赤色酸化水銀(II)(0.0261g、0.121ミリモル)の混合物に添加した。得られた懸濁液を5.5時間激しく攪拌し、更に赤色酸化水銀(II)(0.0130g、0.0600ミリモル)を添加した。更に16時間攪拌した後、反応混合物を9:1CH2Cl2:MeOHで希釈し、シリカゲルの小プラグ上に載せ、同じ溶媒系で溶離した。溶出液を濃縮し、残存物を逆相HPLC(水中20〜70%CH3CNの勾配)で精製し、TFA塩として標題化合物(0.0287g、45%)を得た。この物質をH2O/ジオキサンから凍結乾燥し、白色固体を得た。
1H NMR (CD3OD): δ 7.60 (d, J = 8.4 Hz, 1 H), 7.44-7.38 (2 オーバーラッピング d,3 H), 7.35 (s, 1 H), 7.11 (d, J = 9.2 Hz, 2 H), 4.32 (br t, J = 7.2 Hz, 2 H), 4.12 (q, J = 7.6 Hz, 2 H), 3.56 (br s, 2 H), 3.32 (br s, 2 H), 1.85-1.76 (br m, 3H), 1.43 (t, J = 7.6 Hz, 3 H), 1.25 (br s, 3 H), 1.14 (br s, 3 H), 1.08 (d, J =6.4 Hz, 6 H)。
13C-NMR (CD3OD): δ 172.51,160.57,151.15,134.20,132.87,130.29,128.70,128.44,123.46,117.18,111.54,111.23,65.02,45.07,43.16,41.13,37.49,27.26,22.76,15.07,14.35,13.07。
分析値(としての):計算値: MS (ESI) (M+H)+= 423。
【0198】
【表2】
Figure 2004528334
【0199】
61および62については、1プレート中に調製された2化合物からKi値を測定した。
【0200】
実施例40
2−[(4−エトキシフェニル)メチル]−N,N−ジエチル−1−(3−チエニルメチル)−1H−ベンズイミダゾール−5−カルボキサミド
40A:N,N−ジエチル−3−フルオロ−4−ニトロ−ベンズアミド
3−フルオロ−4−ニトロ安息香酸(5.0g、27.0ミリモル)を一夜2:1CH2Cl2/SOCl2(150ml)の混合物中で還流した。溶媒を濃縮し、残存物をCH2Cl2(50ml)に溶解した。次にジメチルアミン(3.35ml、1.2等量)およびトリエチルアミン(7.5ml、2等量)の別のCH2Cl2溶液(50ml)を酸クロリドの冷攪拌溶液(0℃)に滴加した。溶液を1時間室温で攪拌した。次に溶液を5%KHSO4溶液、飽和NaHCO3溶液、塩水で洗浄し、無水MgSO4上に乾燥した。粗生成物をシリカゲル上の2:1ヘキサン/EtOAcを用いたフラッシュクロマトグラフィーにより精製し、標題化合物を得た(5.10g、79%収率)。
1H NMR (400 MHz, CDCl3) δ 8.12 (m, 1H), 7.29 (m, 2H), 3.56 (br d, 2H), 3.23 (brd, 2H), 1.27 (br s, 3H), 1.15 (br s, 3H)。
【0201】
40B:3−アミノ−N,N−ジエチル−4−ニトロ−ベンズアミド
N,N−ジエチル−3−フルオロ−4−ニトロ−ベンズアミド(5.1g、21.2ミリモル)を48時間NH4OH/EtOHの2:1混合物(150ml)中で還流した。溶液を室温に冷却し、溶媒を濃縮した。次に溶液をEtOAcで抽出した(3×)。合わせた有機層を塩水で洗浄し、無水MgSO4上に乾燥した。粗生成物をEtOAc/ヘキサンから結晶化させ、標題化合物を得た(4.35g、86%収率)。
1H NMR (400 MHz, CD3OD) δ 8.12 (d, J = 8.8 Hz, 1H), 6.92 (s, 1H), 6.56 (d, J = 8.8 Hz, 1H), 3.51 (q, J = 7.2 Hz, 2H), 3.28 (m, 2H), 1.23 (t, J = 7.2 Hz, 3H), 1.13 (t, J = 7.2 Hz, 3H)。
【0202】
40C:N−[5−[(ジエチルアミノ)カルボニル]−2−ニトロフェニル]−4−エトキシ−ベンゼンアセトアミド
3−アミノ−N,N−ジエチル−4−ニトロ−ベンズアミド(1.00g、4.21ミリモル)の攪拌トルエン溶液(100ml)に、4−エトキシフェニルアセチルクロリド(1.25g、1.5等量)および亜鉛粉(415mg、1.5等量)を添加した。溶液を一夜室温で攪拌した。次いで、更に0.5等量の酸クロリドおよび亜鉛粉を添加し、溶液を更に24時間室温で攪拌した。溶液をセライトで濾過し、EtOAcで洗浄した。有機層を飽和NaHCO3溶液、塩水で洗浄し、無水MgSO4上に乾燥した。粗生成物をシリカゲル上の1:1ヘキサン:酢酸エチルを用いたフラッシュクロマトグラフィーにより精製し、所望の生成物を得た(1.52g、92%収率)。
1H NMR (400 MHz, CDCl3) d 8.81 (s, 1H), 8.20 (d, J =8.8 Hz, 1H), 7.26 (m, 3H), 7.15 (d, J =8.8 Hz, 1H), 6.94 (d, J = 8.4 Hz, 2H), 4.06 (q, J = 7.2 Hz, 2H), 3.75(s, 2H), 3.54 (q, J = 6.8 Hz, 2H), 3.24 (q, J = 6.8 Hz, 2H), 1.59 (br s, 1H), 1.42 (t, J =6.8Hz, 3H), 1.25 (t, J = 6.8 Hz, 3H), 1.16 (t, J = 6.8 Hz, 3H)。
【0203】
40D:N−[2−アミノ−5−[(ジエチルアミノ)カルボニル]フェニル]−4−エトキシ−ベンゼンアセトアミド
N−[5−[(ジエチルアミノ)カルボニル]−2−ニトロフェニル]−4−エトキシ−ベンゼンアセトアミド(1.00g、2.50ミリモル)を触媒量の10%Pd/Cを含有するEtOAc(50ml)中に溶解した。溶液を一夜室温で水素雰囲気下(35psi)振とうした。溶液をセライトで濾過し、溶媒を濃縮した。LC/MS分析によれば標題化合物は十分純粋(>95%)であり、直接次の工程に用いることができた。収量:927mg(99%)。
1H NMR (400 MHz, CDCl3) δ 7.54 (s, 1H), 7.25 (d, J =7.6 Hz, 2H), 7.07 (s, 1H), 7.01 (d, J = 8.0 Hz, 1H), 6.91 (d, J = 7.2 Hz, 2H), 6.66 (d, J = 8.4 Hz, 1H), 4.04 (q, J = 6.8 Hz, 2H), 3.69 (s, 2H), 3.39 (br s, 4H), 1.42 (t, J = 6.8 Hz, 3H),1.15 (br s, 6H)。
【0204】
40E:2−[(4−エトキシフェニル)メチル]−N,N−ジエチル−1−(3−チエニルメチル)−1H−ベンズイミダゾール−5−カルボキサミド
N−[2−アミノ−5−[(ジエチルアミノ)カルボニル]フェニル]−4−エトキシ−ベンゼンアセトアミド(100mg、0.271ミリモル)をDCE:AcOHの2:1混合物3mlに溶解した。チオフェン−3−カルボキシアルデヒド(37ml、1.5等量)を添加し、溶液を15分間室温で攪拌した。ボラン/ピリジン複合体溶液(55ml、2等量)を添加し、溶液を1時間室温で攪拌した。濃塩酸数滴(5滴)を添加し、溶液を3時間85℃で攪拌した。溶液を室温に冷却し、溶媒を濃縮した。粗生成物を直接、15〜65%CH3CN/H2Oの勾配を用いた逆相クロマトグラフィー(C−18カラム)で精製し、次に凍結乾燥した。標題化合物を相当するTFA塩として単離した。収量:118mg(78%)。
1H-NMR (400 MHz, CD3OD) δ 7.78 (d, J =8.4 Hz, 1H), 7.70 (s, 1H), 7.48 (d, J = 8.4 Hz 1H), 7.38 (m, 1H), 7.23 (s, 1H), 7.18 (d, J =7.2Hz, 2H), 6.84 (m, 3H), 5.69 (s, 2H), 4.53 (s, 2H), 3.97 (q, J = 7.2 Hz, 2H), 3.54 (br s, 2H), 3.27 (br s, 2H), 1.34 (t, J = 7.2 Hz, 3H), 1.23 (br s, 3H), 1.10 (br s, 3H); MS (ESI) (M+H)+= 448.32;
分析値(C26H29N3O2S + 1.7 TFA + 0.1 H2Oとしての):
計算値: C, 54.90; H, 4.84; N, 6.53。
実測値: C, 54.88; H, 4.86; N, 6.53。
【0205】
実施例41
2−[(4−エトキシフェニル)メチル]−N,N−ジエチル−1−[(2R)−2−ピロリジニルメチル]−1H−ベンズイミダゾール−5−カルボキサミド
操作法40Eを用いて、N−[2−アミノ−5−[(ジエチルアミノ)カルボニル]フェニル]−4−エトキシ−ベンゼンアセトアミド(100mg、0.270ミリモル)およびN−(t−ブトキシカルボニル)−D−プロリナール(76mL,1.5等量)を用いた。粗生成物を直接、5〜50%CH3CN/H2Oの勾配を用いた逆相クロマトグラフィー(C−18カラム)で精製し、次に凍結乾燥した。標題化合物を相当するTFA塩として単離した。収量:86mg(78%)。
1H-NMR (400 MHz,CD3OD) δ7.94 (d, J=8.8Hz, 1H), 7.70 (s, 1H), 7.55 (d, J=8. 4Hz,1H), 7.28 (d, J =8.8 Hz, 2H), 6.94 (d, J =8.8 Hz, 2H), 4.83 (d, J =7.2 Hz, 2H),4.55 (s, 2H), 4.02 (q, J = 7.2 Hz, 2H),3.96 (m, 1H), 3.56 (br s. 2H), 3.48 (m, 1H), 3.27 (m, 3H), 2.24 (m, 1H), 2.14 (m, 1H), 2.04(m, 1H), 1.87 (m, 1H), 1.36 (t, J = 7.2 Hz, 3H), 1.26 (br s, 3H), 1.11 (br s, 3H); MS (ESI) (M+H)+= 435.45;分析値(C26H34N4O2+ 2.2 TFA + 1.6 H2Oとしての):
計算値: C, 51.12; H, 5.56; N, 7.84。
実測値: C, 51.12; H, 5.62; N, 7.82。
【0206】
実施例42
2−[(4−エトキシフェニル)メチル]−N,N−ジエチル−1−[[(2S)−テトラヒドロ−2−フラニル]メチル]−1H−ベンズイミダゾール−5−カルボキサミド
N,N−ジエチル−5−フルオロ−3−ニトロベンズアミド(120mg、0.500ミリモル)、トリエチルアミン(0.105ml、1.5等量)およびS−(+)−テトラヒドロフリルアミン(55mg、1.1等量)の混合物を3時間85℃でEtOH3ml中で攪拌した。溶液を室温に冷却し、溶媒を濃縮した。残存物をEtOAcに溶解し、飽和NaHCO3溶液、塩水で洗浄し、無水MgSO4上に乾燥した。付加物をシリカゲル上の3:1ヘキサン/EtOAcを用いたフラッシュクロマトグラフィーにより精製した。収量:147mg(92%)。
1H NMR (400 MHz, CDCl3) δ8.35 (s,1H), 8.25 (s, 1H), 7.53 (d, J = 8.8 Hz, 1H), 6.89 (d, J = 8.8 Hz, 1H), 4.17 (m, 1H), 3.92 (m, 1H), 3.82 (m, 1H), 2.08 (m, 5H),2.05 (m, 1H), 1.93 (m, 2H), 1.69 (m, 2H), 1.19 (t, J = 6.8Hz, 3H)。
【0207】
次にこのニトロ化合物(125mg、0.389ミリモル)を触媒量の10%Pd/Cを含有するEtOAc20ml中に溶解した。溶液を6時間室温で水素雰囲気下(40psi)振とうした。溶液をセライトで濾過し、溶媒を濃縮し、所望のアニリンを得た。収量:113mg(99%);MS(ESI)(M+H)+=292.31
このアニリン(113mg、0.388ミリモル)を4−エトキシフェニルアセチルクロリド(85mg、1.1等量)と共に30分間室温でジクロロエタン2ml中で攪拌した。濃塩酸数滴(5滴)を添加し、溶液を3時間85℃で攪拌した。溶液を室温に冷却し、溶媒を濃縮した。粗生成物を直接、15〜65%CH3CN/H2Oの勾配を用いた逆相クロマトグラフィー(C−18カラム)で精製し、次に凍結乾燥して標題化合物を得た。生成物は相当するTFA塩として単離した。収量:148mg(69%)。
1H NMR (400 MHz, CD3OD) δ7.99 (d, J = 8.4 Hz, 1H), 7.68 (s, 1H), 7.58 (d, J = 8.8. Hz, 1H), 7.28 (d, J=8.8 Hz, 2H), 6.97 (d, J = 8.4 Hz, 2H), 4.70 (d, J = 14.8Hz, 1H), 4.60 (s, 2H), 4.51 (m, 1H), 4.21 (m, 1H), 4.02 (q, J = 7.2 Hz, 2H), 3.89 (m, 1H), 3.73 (m, 1H), 3.57 (br d, 2H), 3.27 (br s, 2H), 2.18 (m, 1H), 1.97 (m, 2H), 1.76 (m, 1H), 1.36 (t, J = 7.2 Hz, 3H), 1.26 (br s, 3H), 1.11 (br s, 3H); MS (ESI) (M+H)+= 436.43;
分析値(C26H33N3O3+ 2.5 TFA + 0.4 H2Oとしての):
計算値: C, 52.64; H, 5.23; N, 6.06。
実測値: C, 52.59; H, 5.08; N, 6.33。
【0208】
実施例43
2−[(4−エトキシフェニル)メチル]−N,N−ジエチル−1−[[(2R)−1−メチル−2−ピロリジニル]メチル]−1H−ベンズイミダゾール−5−カルボキサミド
N−[2−アミノ−5−[(ジエチルアミノ)カルボニル]フェニル]−4−エトキシ−ベンゼンアセトアミド(85mg、0.230ミリモル)およびN−(t−ブトキシカルボニル)−D−プロリナール(0.06ml、1.5等量)を混合し、実施例40Eに記載の方法で環化した。次に溶媒を濃縮した。残存物をMeOHに溶解し、水中37%ホルムアルデヒド(ホルマリン)(数滴、過剰量)、次いでナトリウムシアノボロハイドライド(43mg、3等量)を添加した。次に溶液を1時間室温で攪拌した。粗生成物を直接、15〜65%CH3CN/H2Oの勾配を用いた逆相クロマトグラフィー(C−18カラム)で精製し、次に凍結乾燥して相当するTFA塩として標題化合物(46mg、36%収率)を得た。
1H NMR (400 MHz, CD3OD) δ7.80 (d, J = 8.8 Hz, 1H), 7.69 (s, 1H), 7.48 (d, J = 8.4 Hz, 1H), 7.22 (d,J = 8.8 Hz, 2H), 6.92 (d, J = 8.4 Hz, 2H), 4.85 (m, 1H), 4.66 (m, 1H), 4.49 (s, 2H), 4.01 (q, J = 7.2 Hz, 2H), 3.78 (br s, 2H), 3.56 (br s, 2H), 3.27 (br s, 3H), 2.95 (s, 3H), 2.02 (m, 3H), 1.85 (m, 1H), 1.35 (t, J =7.2 Hz, 3H), 1.25 (br s, 3H), 1.11 (br s, 3H); MS (ESI) (M+H)+= 449.45;
分析値(C27H36N4O2+ 2.4 TFA + 1.1 H2Oとしての):
計算値: C, 51.47; H, 5.51; N, 7.55。
実測値: C, 51.46; H, 5.43; N, 7.67。
【0209】
実施例44および45
2−[(4−エトキシフェニル)メチル]−N,N−ジエチル−1−[[(2R)−1−メチル−2−ピペリジニル]メチル]−1H−ベンズイミダゾール−5−カルボキサミドおよび2−[(4−エトキシフェニル)メチル]−N,N−ジエチル−1−[[(2S)−1−メチル−2−ピペリジニル]メチル]−1H−ベンズイミダゾール−5−カルボキサミド
実施例40Eの操作法に従い、N−[2−アミノ−5−[(ジエチルアミノ)カルボニル]フェニル]−4−エトキシ−ベンゼンアセトアミド(70mg、0.189ミリモル)および2−N−(t−ブトキシカルボニル)−1−ピペリジンカルボキシアルデヒド(52mg、1.5等量)を使用した。次に粗生成物を数滴の氷酢酸を含有するMeOH(3ml)に溶解した。過剰量の37%HCHO/H2O、次いでNaCNBH3(24mg、2等量)を添加した。溶液を30分間室温で攪拌した。溶媒を濃縮し、粗生成物を直接、5〜50%CH3CN/H2Oの勾配を用いた逆相クロマトグラフィー(C−18カラム)で精製し、次に凍結乾燥して2種のエナンチオマーの混合物として所望の生成物を得た。生成物は相当するTFA塩として単離した。収量:53mg(50%)。2種のエナンチオマーは0.1%ジエチルアミンを含有する30%iPrOH/ヘキサンのイソクラティックな溶離によるキラルADカラムを用いたキラルクロマトグラフィーにより分離し、2種のエナンチオマー、2−[(4−エトキシフェニル)メチル]−N,N−ジエチル−1−[[(2R)−1−メチル−2−ピペリジニル]メチル]−1H−ベンズイミダゾール−5−カルボキサミド(20mg、50%)および2−[(4−エトキシフェニル)メチル]−N,N−ジエチル−1−[[(2S)−1−メチル−2−ピペリジニル]メチル]−1H−ベンズイミダゾール−5−カルボキサミド(20mg、50%)を得た。
【0210】
エナンチオマー:2−[(4−エトキシフェニル)メチル]−N,N−ジエチル−1−[[(2R)−1−メチル−2−ピペリジニル]メチル]−1H−ベンズイミダゾール−5−カルボキサミド
1H NMR (400 MHz, CD3OD) δ7.71 (br s, 1H), 7.68 (s, 1H), 7.43 (d, J = 8.4 Hz, 1H), 7.21 (d, J = 8.6 Hz, 2H), 6.92 (d, J = 8.6 Hz, 2H), 4.85 (s, 2H), 4.42 (s, 2H), 3.97 (q, J =7.2 Hz, 2H), 3.55 (br s, 2H), 3.27 (m, SH), 3.03 (s, 3H), 2.98 (br s, 1H), 1.85 (br s, 1H), 1.74 (m, 3H), 1.50 (br s, 1H), 1.34 (t, J = 7.2 Hz, 3H),1.25 (br s, 3H), 1.11 (br s, 3H)。MS (ESI) (M+H)+= 463.51 ;
分析値(C28H38N4O2+ 2.1 TFA + 0.6 H2Oとしての):
計算値: C, 54.25; H, 5.84; N, 7.86。
実測値: C, 54.24; H, 5.69; N, 8.17;
HPLCk':1.99(カラム:キラルAD、勾配30%B25分間、流量1ml/分、25℃;溶媒A:ヘキサン中0.1%DEA、溶媒B:iPrOH中0.1%DEA)。
【0211】
エナンチオマー:2−[(4−エトキシフェニル)メチル]−N,N−ジエチル−1−[[(2S)−1−メチル−2−ピペリジニル]メチル]−1H−ベンズイミダゾール−5−カルボキサミド:1HNMR、MSおよび元素分析はそのエナンチオマーと同様;HPLCk':4.97(カラム:キラルAD、勾配30%B25分間、流量1ml/分、25℃;溶媒A:ヘキサン中0.1%DEA、溶媒B:iPrOH中0.1%DEA)
【0212】
実施例46
2−[(4−エトキシフェニル)ヒドロキシメチル]−N,N−ジエチル−1−(3−メチルブチル)−1H−ベンズイミダゾール−5−カルボキサミド
2−(4−エトキシフェニル)−N,N−ジエチル−1−(3−メチルブチル)−1H−ベンズイミダゾール−5−カルボキサミド(110mg、0.252ミリモル)をEtOH3mlに溶解した。NaBH4(12mg、1.2等量)を添加し、溶液を1時間室温で攪拌した。溶媒を濃縮し、残存物をEtOAcに溶解した。有機層を飽和NaHCO3溶液、塩水で洗浄し、無水MgSO4上に乾燥した。粗生成物を直接、10〜65%CH3CN/H2Oの勾配を用いた逆相クロマトグラフィー(C−18カラム)で精製し、次に凍結乾燥して標題化合物を得た。生成物は相当するTFA塩として単離した。収量:102mg(73%)。
1H NMR (400 MHz, CD3OD) δ7.85 (br s, 2H), 7.62 (br s, 1H), 7.40 (br s, 2H), 7.01 (br s, 2H), 6.33 (br s, 1H), 4.29 (br s, 2H), 4.06 (br s, 2H), 3.62 (br s, 2H), 3.32 (br s, 2H), 1.55 (br, 2H), 1.38 (br s, 3H), 1.30 (br s, 3H), 1.17 (br s, 2H), 0.90 (s, 3H), 0.83 (s, 3H);MS (ESI) (M+H)+= 438.30;
分析値(C26H35N3O3+ 1.2 TFAとしての):
計算値: C, 59.38; H, 6.35; N, 7.32。
実測値: C, 59.36; H, 5.97; N, 7.37。
【0213】
実施例47
N−[2−[(4−エトキシフェニル)メチル]−1−(3−チエニルメチル)−1H−ベンズイミダゾール−5−イル]−N,3−ジメチル−ブタンアミド
47A:メチル(4−ニトロフェニル)−カルバミン酸1,1−ジメチルエチルエステル
乾燥DMF(100ml)中のNaH(1.15g、1.5等量、油中60%)の攪拌溶液に、0℃でN−メチル−4−ニトロアニリン(3.00g、19.7ミリモル)のDMF溶液(25ml)を添加した。次に溶液を15分間0℃で攪拌した。次にジ−t−ブチルジカーボネート(4.30g、1.2等量)のDMF溶液(50ml)を添加し、溶液を3時間室温で激しく攪拌した。溶液に飽和NH4Cl溶液を添加することによりクエンチングし、溶媒を濃縮した。残存物をEtOAcに溶解し、飽和NaHCO3溶液、塩水で洗浄し、無水MgSO4上に乾燥した。粗生成物をシリカ上の4:1ヘキサン/EtOAcを用いたフラッシュクロマトグラフィーにより精製し、所望の生成物メチル(4−ニトロフェニル)−カルバミン酸1,1−ジメチルエチルエステル4.50g(90%収率)を得た。
1H NMR (400 MHz, CDCl3) δ8.19 (d, J = 8.8 Hz, 2H), 7.46 (d, J = 8.8 Hz, 2H), 3.35 (s, 3H), 1.51 (s, 9H)。
【0214】
47B:(3−アミノ−4−ニトロフェニル)メチル−カルバミン酸1,1−ジメチルエチルエステル
窒素下、t−BuOK(9.0g、4.5等量)およびCuCl(176mg、0.1等量)の冷(0℃)DMF溶液(50ml)に、メチル(4−ニトロフェニル)−カルバミン酸1,1−ジメチルエチルエステル(4.49g、17.8ミリモル)および塩酸メトキシルアミン(1.85g、1.25等量)のDMF(100ml)溶液を添加した。溶液を1時間かけて室温に戻した。次に反応混合物を飽和NH4Clでクエンチングし、溶媒を濃縮した。残存物を水で希釈し、EtOAcで抽出した。有機層を塩水で洗浄し、無水MgSO4上に乾燥した。粗生成物をシリカゲル上の2:1ヘキサン/EtOAcを用いたフラッシュクロマトグラフィーにより精製し、所望の生成物(3−アミノ−4−ニトロフェニル)メチル−カルバミン酸1,1−ジメチルエチルエステル(1.10g、24%収率)を得た。
1H-NMR (400 MHz, CDCl3) δ8.06 (d, J = 9.2 Hz, 1H), 6.78 (s, 1H), 6.67 (d, J = 9.2 Hz 1H), 6.10 (br s, 2H), 3.28 (s, 3H), 1.50 (s, 9H)。
【0215】
47C:[3−[[(4−エトキシフェニル)アセチル]アミノ]−4−ニトロフェニル]メチル−カルバミン酸1,1−ジメチルエステル
(3−アミノ−4−ニトロフェニル)メチル−カルバミン酸1,1−ジメチルエチルエステル(1.10g、4.12ミリモル)の攪拌トルエン溶液(100ml)に、4−エトキシフェニルアセチルクロリド(980mg、1.2等量)および亜鉛粉(400mg、1.5等量)を添加した。溶液を一夜室温で攪拌した。更に0.5等量の酸クロリドと亜鉛粉を添加し、溶液を更に24時間室温で攪拌した。次に溶液をセライトで濾過し、EtOAcで洗浄した。有機層を飽和NaHCO3溶液、塩水で洗浄し、無水MgSO4上に乾燥した。粗生成物をシリカゲル上の2:1ヘキサン/EtOAcを用いたフラッシュクロマトグラフィーにより精製し、所望の生成物[3−[[(4−エトキシフェニル)アセチル]アミノ]−4−ニトロフェニル]メチル−カルバミン酸1,1−ジメチルエステル(1.18g、67%収率)を得た。
1H-NMR (400MHz, CDCl3) δ8.77 (s, 1H), 8.11 (d, J = 9.2 Hz, 1H), 7.22 (m, 3H), 6.93 (d, J = 9.2 Hz, 2H), 4.40 (m, 2H), 3.75 (s, 2H), 3.33 (s, 3H), 1.50 (s, 9H),1.42 (t, J = 6.8 Hz, 3H)。
【0216】
47D:4−エトキシ−N−[5−(メチルアミノ)−2−ニトロフェニル]−ベンゼンアセトアミド
[3−[[(4−エトキシフェニル)アセチル]アミノ]−4−ニトロフェニル]メチル−カルバミン酸1,1−ジメチルエステル(1.10g、2.56ミリモル)を2時間室温で1MHCl/AcOH15ml中で攪拌した。溶媒を濃縮した。残存物をEtOAcに溶解し、飽和NaHCO3溶液、塩水で洗浄し、無水MgSO4上に乾燥した。生成物を直接次の工程に使用した。収量:845mg(99%)。
1H NMR (400 MHz, CDCl3) δ8.80 (d, J = 9.2Hz, 1H), 8.02 (s, 1H), 7.25 (d, J = 6.8 Hz, 2H), 6.91 (d, J = 8.4 Hz, 2H), 6.22 (d, J = 9.2 Hz, 1H), 4.74 (br d, 1H), 4.04 (q, J = 7.2 Hz, 2H), 3.73 (s, 2H), 2.94 (s, 3H), 1.41 (t, J = 7.2 Hz, 3H)。
【0217】
47E:4−エトキシ−N−[5−[メチル(3−メチル−1−オキソブチル)アミノ]−2−ニトロフェニル]−ベンゼンアセトアミド
4−エトキシ−N−[5−(メチルアミノ)−2−ニトロフェニル]−ベンゼンアセトアミド(845mg、2.56ミリモル)およびDMAP(470mg、1.5等量)の1:1DCE:CH3CN溶液(50ml)にイソバレリルクロリド(0.47ml、1.5等量)を添加した。溶液を48時間室温で攪拌した。次に溶液を5%KHSO4、飽和NaHCO3溶液、塩水で洗浄し、無水MgSO4上に乾燥した。粗生成物を7:1CH2Cl2:エーテルを用いたフラッシュクロマトグラフィーにより精製し、所望の生成物、4−エトキシ−N−[5−[メチル(3−メチル−1−オキソブチル)アミノ]−2−ニトロフェニル]−ベンゼンアセトアミド(1.06g、99%収率)を得た。
1H NMR (400 MHz,CDCl3) δ8. 72 (s, 1H), 8.21 (d, J = 8.8 Hz, 1H), 7.26 (m, 3H), 6.96 (m, 2H), 4.06 (m, 2H),3.76 (s, 2H), 3.31 (s, 3H), 2.15 (m, 3H), 1.42 (t, J = 7.2 Hz, 3H), 0.88 (d, J = 6.8 Hz, 6H)。
【0218】
47F:4−エトキシ−N−[2−アミノ−5−[メチル(3−メチル−1−オキソブチル)アミノ]フェニル]−ベンゼンアセトアミド
4−エトキシ−N−[5−[メチル(3−メチル−1−オキソブチル)アミノ]−2−ニトロフェニル]−ベンゼンアセトアミド(1.05g、2.53ミリモル)を触媒量の10%Pd/Cを含有するEtOAc(50ml)に溶解した。一夜室温で水素雰囲気下(35psi)溶液を振とうした。溶液をセライトで濾過し、溶媒を濃縮した。LC/MS分析によれば標題化合物は純粋(>95%)であり、次の工程に直接使用できた。収量:965mg(99%)。
1H NMR (400 MHz, CDCl3) δ7.23 (d, J =8.8 Hz, 2H), 7.12 (s, 1H), 7.00 (s,1H), 6.93 (d, J = 8.8 Hz, 1H), 6.78 (m, 2H), 4.01 (q, J=7.0 Hz, 2H), 3.69 (s, 2H), 3.13(s, 3H), 2.05 (m, 1H), 1.93 (d, J = 7.2 Hz, 2H), 1.39 (t, J = 7.2 Hz, 3H), 0.78(d, J = 6.8 Hz, 6H)。
【0219】
47G:N−[2−[(4−エトキシフェニル)メチル]−1−(3−チエニルメチル)−1H−ベンズイミダゾール−5−イル]−N,3−ジメチル−ブタンアミド
実施例40Eの操作法に従い、4−エトキシ−N−[2−アミノ−5−[メチル(3−メチル−1−オキソブチル)アミノ]フェニル]−ベンゼンアセトアミド(75mg、0.196ミリモル)およびチオフェン−3−カルボキシアルデヒド(26ml、1.5等量)を用いた。粗生成物を直接、15〜65%CH3CN/H2Oの勾配を用いた逆相クロマトグラフィー(C−18カラム)で精製し、次に凍結乾燥した。標題化合物を相当するTFA塩として単離した。収量:55mg(50%)。
1H NMR (400 MHz, CD3OD) δ7.54 (m, 2H), 7.30 (d, J = 4.8 Hz, 1H), 7.17 (d, J = 8.4Hz, 1H), 7.12 (d, J = 8.4 Hz, 2H), 7.05 (s, 1H), 6.80 (d, J = 8.8 Hz, 2H), 6.70 (d, J = 5.2 Hz, 1H), 5.48 (s, 2H), 4.35 (s, 2H), 3.95 (q, J = 7.2 Hz, 2H), 3.23 (s, 3H), 2.03 (br s, 1H), 1.94 (br s, 2H), 1.31 (t, J = 7.2 Hz, 3H), 0.76 (br s, 6H); MS (ESI) (M+H)+= 462.43;
分析値(C27H31N3O2S + 0.7 TFA + 0.5 H2Oとしての):
計算値: C, 61.97; H, 5.99; N, 7.63。
実測値: C, 61.88; H, 6.03; N, 7.62。
【0220】
実施例48
N−[2−[(4−エトキシフェニル)メチル]−1−[(2R)−2−ピロリジニルメチル]−1H−ベンズイミダゾール−5−イル]−N,3−ジメチル−ブタンアミド
実施例40Eの操作法に従い、4−エトキシ−N−[2−アミノ−5−[メチル(3−メチル−1−オキソブチル)アミノ]フェニル]−ベンゼンアセトアミド(75mg、0.196ミリモル)およびN−(t−ブトキシカルボニル)−D−プロリナール(55mL,1.5等量)を用いた。粗生成物を直接、5〜50%CH3CN/H2Oの勾配を用いた逆相クロマトグラフィー(C−18カラム)で精製し、次に凍結乾燥した。標題化合物を相当するTFA塩として単離した。収量:81mg(73%)。
1H NMR (CD3OD) δ7.91 (d, J = 8.8Hz, 1H), 7.59 (s, 1H), 7.43 (d, J = 8.8 Hz,1H),7.26 (d, J = 8.8 Hz, 2H), 6.93 (d, J = 8.8 Hz, 2H), 4.79 (d, J = 7.2 Hz, 2H), 4.53 (s, 2H),3.98 (q, J = 7.2 Hz, 2H), 3.88 (m, 1H), 3.44 (m, 1H), 3.23 (s, 3H), 2.18 (m, 1H), 2.13 (m, 1H), 2.05 (m, 2H), 1.98 (m, 3H), 1.81 (m, 1H), 1.33 (t, J= 7.2 Hz, 3H), 0.78 (br s, 6H) ; MS (ESI)(M+H)+= 449.50;
分析値(C27H36N4O2+ 2.3 TFA + 1.8 H2Oとしての):
計算値: C, 51.06; H, 5.68; N, 7.54。
実測値: C, 51.06; H, 5.73; N, 7.26。
【0221】
実施例49
N−[1−[[5−[(アセチルオキシ)メチル]−2−フラニル]メチル]−2−[(4−エトキシフェニル)メチル]−1H−ベンズイミダゾール−5−イル]−N,3−ジメチル−ブタンアミド
実施例40Eの操作法に従い、4−エトキシ−N−[2−アミノ−5−[メチル(3−メチル−1−オキソブチル)アミノ]フェニル]−ベンゼンアセトアミド(75mg、0.196ミリモル)および5−[(アセチルオキシ)メチル]−2−フランカルボキシアルデヒド(50mg、1.5等量)を用いた。粗生成物を直接、15〜65%CH3CN/H2Oの勾配を用いた逆相クロマトグラフィー(C−18カラム)で精製し、次に凍結乾燥した。標題化合物を相当するTFA塩として単離した。収量:63mg(51%)。
1H NMR (400 MHz, CD3OD) δ8.01 (d, J = 8.8 Hz, 1H), 7.64 (s, 1H), 7.49 (d, J=8.8Hz, lH), 7.27 (d, J = 8.4 Hz, 2H), 6.94 (d, J = 8.4 Hz, 2H), 6.50 (d, J =3.2 Hz,1H), 6.39 (d, J = 3.2 Hz, 1H), 5.75 (s, 2H), 4.92 (s, 2H), 4.68 (s, 2H), 4.00 (q, J = 7.2 Hz, 2H), 3.27 (s, 3H), 2.02 (m, 1H), 1.96 (br s, 5H), 1.36 (t, J = 7.2 Hz, 3H), 0.79 (s, 6H) ; MS (ESI) (M+H)+= 518. 49;
分析値(C30H35N3O5+ 1.6 TFA + 0.6 H2Oとしての):
計算値: C, 56.10; H, 5.36; N, 5.91。
実測値: C, 56.14; H, 5.40; N, 5.95。
【0222】
実施例50
N−[2−(4−エトキシベンジル)−1−[(2S)−2−ピロリジニルメチル]−1H−ベンズイミダゾール−5−イル]−N',N−(1−イソプロピル)尿素
50A:N−[5−[メチル[[イソプロピルアミノ]カルボニル]アミノ]−2−ニトロフェニル]−4−エトキシベンゼンアセトアミド
1,2−ジクロロエタン(100ml)中の4−エトキシ−N−[5−(メチルアミノ)−2−ニトロフェニル]−ベンゼンアセトアミド(2.20g、6.69ミリモル)の混合物を窒素下室温で攪拌し、その間、トリホスゲン(1.99g、6.69ミリモル)およびTEA(0.93ml、6.69ミリモル)を添加した。30分後、DMAP(817mg、6.69ミリモル)およびイソプロピルアミン(3.42ml、40.0ミリモル)を添加し、内容物を45℃で16時間攪拌した。飽和NaHCO3水溶液(40ml)で混合物をクエンチングし、層を分離させた。水層をジクロロメタン(2×50ml)で抽出し、有機層を合わせ、塩水(50ml)で洗浄し、Na2SO4上に乾燥した。固体を濾去し、濾液を真空下に濃縮して得られた残存物をカラムクロマトグラフィー(75%EtOAc、25%ヘプタン、シリカゲル上)により精製し、標題化合物(2.44g、88%)を得た。
1H NMR (400 MHz, CDCl3) : δ1.14 (d, J= 6.4,6H), 1.38 (t, J= 7.1 Hz, 3H), 3.29 (s, 3H), 3.71 (s, 2H), 4.01 (q, J = 7.1 Hz, 2H), 4.70 (s, 1H), 6.90 (d, J= 8.8 Hz, 2H), 7.00 (dd, J= 2.5, 9.2 Hz,1H), 7.22 (d, J= 8.8 Hz, 2H), 8.13 (d, J = 9.2 Hz, 1H), 8.61 (d, J= 2.5 Hz, 1H)。MS (ESI) (M+H)+=415。
【0223】
50B:N−[2−アミノ−5−[メチル[[イソプロピルアミノ]カルボニル]アミノ]フェニル]−4−エトキシベンゼンアセトアミド
N−[5−[メチル[[イソプロピルアミノ]カルボニル]アミノ]−2−ニトロフェニル]−4−エトキシベンゼンアセトアミド(190mg、0.46ミリモル)およびEtOAc中10%Pd/C(5.0ml)の混合物を30psiで4時間水素化した。内容物をセライトで濾過し、セライトをEtOAc(2×10.0ml)で洗浄した。溶媒を真空下に除去し、得られた標題化合物(170mg、99%)を更に精製することなく用いた。
1H-NMR (400 MHz, CDCl3): δ0.98 (d, J= 6.5 Hz, 6H), 1.38 (t, J= 7.1 Hz, 3H), 3.09 (s, 3H), 3.69 (s, 2H), 3.86 (spt, J= 6.7Hz, 1H), 3.99 (q, J= 7.0 Hz, 2H), 4.11-4.13 (m, 1H), 6.71 (d, J= 8.4 Hz, 1H), 6.82 (dd, J= 2.4 Hz, J = 8.4 Hz, 1H), 6.87 (d, J= 8.6 Hz, 2H), 6.96 (d, J = 2.3 Hz, 1H), 7.24 (d, J= 8.6 Hz, 2H), 7.58 (s, 1H)。MS (ESI) (M+H)+= 385。
【0224】
50C:N−[2−(4−エトキシベンジル)−1−[(2S)−2−ピロリジニルメチル]−1H−ベンズイミダゾール−5−イル]−N',N−(1−イソプロピル)尿素
実施例40Eの操作法に従い、1,2−ジクロロエタン/AcOH(2:1、7.5ml)の混合物中のN−[2−アミノ−5−[メチル[[イソプロピルアミノ]カルボニル]アミノ]フェニル]−4−エトキシベンゼンアセトアミド(83mg、0.22ミリモル)および2−(S)−N−Boc−プロリナール(56μL、0.30ミリモル)の混合物を2.5時間室温で攪拌した。BH3・ピリジン複合体(43μl、0.42ミリモル)をシリンジで添加し、内容物を16時間攪拌した。混合物を6時間還流下に加熱した。通常の後処理により得られた残存物を逆相高速液体クロマトグラフィー(HPLC、C−18カラム)により精製し、トリフルオロ酢酸(TFA)塩として標題化合物を得た(25mg、26%)。
1H-NMR (400MHz, MeOH-d4): δ1.08 (d, J= 6.6 Hz, 6H), 1.36 (t, J= 6.9 Hz, 3H), 1.75-1.85 (m, 1H), 1.96-2.05 (m, 1H), 2.10-2.20 (m, 2H), 3.26 (s, 3H), 3.44 (m, 1H), 3.85-3.93 (m, 2H), 4.01 (q, J= 7.1 Hz, 2H), 4.47 (s, 2H), 4.70 (d, J= 7.2 Hz,2H), 6.93 (d, J= 8.6 Hz, 2H), 7.24 (d, J= 8.6 Hz, 2H), 7.38 (dd, J= 2.0, J= 8.8Hz, 1H), 7.57 (d, J= 2.0 Hz), 7.77 (d, J= 8.6 Hz)。MS (ESI) (M+H)+= 450。
【0225】
実施例51
1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−N−メチル−1H−ベンズイミダゾール−5−アミン
方法A:
51AA:1−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−N−メチル−1H−ベンズイミダゾール−5−アミン
THF中のメチル[1−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−1H−ベンズイミダゾール−5−イル]カーバメート(0.781g、2.06ミリモル)の懸濁液に0℃でLAH(0.32g、8.43ミリモル)を添加した。混合物を0℃で1時間、そして還流下に2.5時間攪拌し、−78℃に冷却し、MeOH(5ml)およびH2O(5ml)でクエンチングした。Na2SO4(10g)を添加した後、得られた混合物を室温で1時間攪拌した。濾過し、濃縮した後、残存物をシリカゲル上でEtOAcを用いながらMPLCにより精製し、オフホワイトの固体として標題化合物641.7mg(93%)を得た。
1H-NMR (CDCl3) : δ0.22 (m, 2H), 0.48 (m, 2H), 1.26 (m, 1H), 1.38 (t, J= 7.0 Hz,3H), 2.89 (s, 3H), 3.83 (d, J= 6.6 Hz, 2H), 3.98 (q, J= 7.0 Hz, 2H), 4.23 (s, 2H), 6.64 (dd, J= 8.6, 2.2 Hz, 1H), 6.80 (d, J= 8.6 Hz, 2H), 6.99 (d, J= 2.1 Hz, 1 H), 7.13 (m, 3H)。MS (ESI) (M+H)+= 336.42。
【0226】
51AB:1,1−ジメチルエチル[1−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−1H−ベンズイミダゾール−5−イル]メチルカーバメート
THF(60ml)中の1−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−N−メチル−1H−ベンズイミダゾール−5−アミン(816.9mg、2.44ミリモル)およびBoc2O(930.1mg、4.26ミリモル)の溶液を室温で週末を通じて攪拌した。溶媒を蒸発した後、残存物をシリカゲル上のヘキサン/EtOAc(1:1)を用いたMPLCにより精製し、白色固体として標題化合物917.7mg(87%)を得た。MS(ESI)(M+H)+=436.49
【0227】
51AC:1,1−ジメチルエチル[1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−1H−ベンズイミダゾール−5−イル]メチルカーバメート
THF中の1,1−ジメチルエチル[1−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−1H−ベンズイミダゾール−5−イル]メチルカーバメート(654.3mg、1.50ミリモル)の溶液に−78℃でKHMDS(0.5M、4ml、2.0ミリモル)を添加した。40分間攪拌した後、MeI(283.9mg、2.0ミリモル)を添加した。混合物を室温で一夜攪拌し、MeOH(0.5ml)および飽和NaHCO3(10ml)でクエンチングした。2層に分離させ、水層をEtOAc(3×30ml)で抽出した。合わせた有機層を塩水(2×30ml)で洗浄し、Na2SO4上に乾燥した。濃縮後、残存物をシリカゲル上のヘキサン/EtOAc(1:1)を用いたMPLCにより精製し、黄色シロップ状物として所望の化合物541.3mg(80%)を得た。MS(ESI)(M+H)+=450.44。
【0228】
51AD:1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−N−メチル−1H−ベンズイミダゾール−5−アミン
4NHCl/ジオキサン(20ml)中の1,1−ジメチルエチル[1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−1H−ベンズイミダゾール−5−イル]メチルカーバメート(541.3mg、1.20ミリモル)の混合物を室温で2.5時間攪拌した。溶媒を蒸発させ、残存物を水(30ml)に溶解し、2NNaOHで中和し、EtOAc(4×30ml)で抽出した。合わせた有機層を飽和NaHCO3で洗浄し、Na2SO4上に乾燥した。濾過し、濃縮した後、シロップ状物として標題化合物523.0mg(100%)を得た。MS(ESI)(M+H)+=350.35。
【0229】
方法B:
51BA:エチル4−エトキシフェニル−2−プロピオネート
DMF(100m)中の4−ヒドロキシフェニル−2−プロピオン酸(5.82mg、35.1ミリモル)の溶液に0℃でK2CO3(12.12g、87.7ミリモル)を添加した。1時間攪拌した後、EtI(7.0ml、13.68g、87.7ミリモル)を添加した。混合物を室温で週末を通じて攪拌し、水(400ml)で希釈し、EtOAc(4×100ml)で抽出した。合わせた有機層を水(2×100ml)および塩水(100ml)で洗浄し、Na2SO4上に乾燥した。濾過し、濃縮した後、残存物をシリカゲル上のヘキサン/EtOAc(4:1)を用いたMPLCにより精製し、無色液体として所望の化合物7.61g(98%)を得た。
1H NMR (400 MHz, CDCl3) : δ1.18 (t, J= 7.2 Hz, 3H), 1.38 (t, J= 7.0 Hz, 3H), 1.44 (d, J=7.0 Hz, 3H), 3.62 (q, J= 7.0 Hz, 2H), 3.99 (q, J= 7.1 Hz, 2H), 4.1 (m, 1H), 6.8 (m, 2H), 7.2 (m, 2H)。
【0230】
51BB:4−エトキシフェニル−2−プロピオン酸
THF−H2O(7:3)30ml中のエチル4−エトキシフェニル−2−プロピオネートの溶液に、LiOH(0.29g、12.0ミリモル)を添加した。混合物を40℃で24時間加熱し、水(20ml)で希釈した。水層をエーテルで抽出し、2NHClで酸性化し、次にエーテル(4×20ml)で抽出した。合わせた有機層を塩水で洗浄し、Na2SO4上に乾燥した。濾過し、濃縮した後、白色固体として標題化合物1.14g(98%)を得た。
1H NMR (400 MHz, CDCl3) : δ1.38 (t, J= 7.0 Hz, 3H), 1.47 (d, J= 7.2 Hz, 3 H), 3.66 (q, J= 7.2 Hz, 1H), 3.99 (q, J= 7.0 Hz, 2H), 6.8(m, 2H), 7.2 (m, 2H)。
【0231】
51BC:N−[1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−1H−ベンズイミダゾール−5−イル]アセトアミド
DMF(40ml)中のN−[3−アミノ−4−[(シクロプロピルメチル)アミノ]フェニル]アセトアミド(1.28g、5.82ミリモル)および4−エトキシフェニル−2−プロピオン酸(1.13g、5.82ミリモル)の溶液に、室温でDIPEA(1.52mL、1.13g、8.73ミリモル)を添加した。10分間攪拌した後、HATU(2.66g、6.98ミリモル)を1回で添加した。混合物を室温で一夜攪拌した後、少量(10ml)となるまで濃縮し、その後H2O(100ml)を添加し、これを酢酸エチル(4×50mL)で抽出した。濾過し、蒸発した後、残存物を酢酸(40ml)に溶解し、次に100℃で20時間加熱した。溶媒を除去した後、残存物をEtOAc(200ml)に溶解し、10%Na2SO4で洗浄し、Na2SO4上に乾燥した。濃縮後、粗生成物をEtOAcを用いたMPLCにより精製し、明黄色固体として標題化合物2.14g(97%)を得た。
1H-NMR (400MHz, CDCl3) : d 0.11 (m, 1H), 0.27 (m, 1H), 0.47 (m, 2H), 0.94 (m, 1H), 1.38 (t, J= 7.0 Hz, 3H), 1.81 (d, J= 7.0 Hz, 3H), 2.21 (s, 3H), 3.76 (dd, J=15.0,6.8 Hz, 1H), 3.86 (dd, J= 15.0, 6.5 Hz, 1H), 3.97 (q, J=6.8Hz, 2H), 4.28 (q, J= 7.0 Hz, 1H), 6.79 (d, J = 8.6 Hz, 2H), 7.10 (d, J= 8.6 Hz, 2 H), 7.23 (d, J= 8.6 Hz, 1H), 7.43 (s, 1H), 7.53 (dd, J= 8.6, 1.9 Hz, 1H), 7.78 (d, J= 2.0 Hz,1H)。MS (ESI) (M+H)+= 378.38。
【0232】
51BD:N−[1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−1H−ベンズイミダゾール−5−イル]−N−メチルアセトアミド
THF(100ml)中のN−[1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−1H−ベンズイミダゾール−5−イル]アセトアミド(2.13g、5.64ミリモル)の溶液に、NaH(0.45g、11.28ミリモル)を0℃で添加した。2時間攪拌した後、ヨードメタン(1.60g、11.28ミリモル)を室温で添加した。混合物を一夜攪拌し、MeOH(2ml)でクエンチングし、エーテル(200ml)で希釈し、塩化アンモニウムの飽和溶液(100ml)で洗浄し、Na2SO4上に乾燥した。濾過し、蒸発させた後、粗生成物として標題化合物(2.43g、100%)を得た。MS(ESI)(M+H)+=392.40。
【0233】
51BE:1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−N−メチル−1H−ベンズイミダゾール−5−アミン
EtOH中のN−[1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−1H−ベンズイミダゾール−5−イル]−N−メチルアセトアミド(2.43g、5.64ミリモル)および40%KOH(50ml)の混合物を20時間還流下に加熱した。冷却後、混合物を少量(50ml)となるまで濃縮し、H2O(50ml)で希釈し、ジクロロメタン(4×50ml)で抽出した。合わせた有機層をNa2SO4上に乾燥した。濾過し、溶媒を蒸発させた後、残存物をシリカゲル上のEtOAcを用いたMPLCにより精製し、オフホワイトの固体として標題化合物1.93g(99%)を得た。MS(ESI)(M+H)+=350.37。
【0234】
実施例52
N−[1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−1H−ベンズイミダゾール−5−イル]−N,3−ジメチルブタンアミド
MeCN(25ml)中の1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−N−メチル−1H−ベンズイミダゾール−5−アミン(349.5mg、1.0ミリモル)の溶液に、DIPEA(258.5mg、2.0ミリモル)、DMAP(10mg)およびイソバレリルクロリド(180.9mg、1.5ミリモル)を0℃で添加した。反応混合物を室温で一夜攪拌し、H2O(150ml)でクエンチングし、EtOAc(4×50ml)で抽出した。合わせた有機層を塩水で洗浄し、Na2SO4上に乾燥した。濾過し、溶媒を蒸発させた後、残存物をシリカゲル上のEtOAcを用いたMPLCにより精製し、無色のシロップ状物として得られた所望の生成物431.9mg(99%)を白色固体のTFA塩に変換した。
1H NMR (400 MHz, CD3OD) : δ0.22 (m, 1H), 0.45 (m, 2H), 0.57 (m, 1H), 0.86 (d, J= 5.9 Hz, 6H), 1.02 (m, 1H), 1.38 (t, J= 7.0 Hz, 3H), 1.83 (d, J= 7.0 Hz, 3H), 2.06 (m, 2H), 2.10 (m, 1H), 3.34 (s, 3H), 4.02 (m, 3H), 4.21 (dd, J= 15.0, 6.6 Hz, 1H), 4.65 (q, J= 7.0 Hz, 1H), 6.90 (d, J = 8.6 Hz, 2H), 7.21 (d, J= 8.6 Hz, 2H), 7.28 (d, J= 8.4 Hz, 1H), 7.62 (s, 1H), 7.72 (d, J= 8.6Hz, 1H)。MS (ESI) (M+H)+= 434.42 (M+1)+
分析値(C27H35N3O2+0.80 TFA+0.90 MeOHとしての):
計算値: C, 64.00; H, 7.17; N, 7.54。
実測値: C, 63.98; H, 7.02; N, 7.34。
【0235】
実施例53、54および55
(rac)−N−[1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−1H−ベンズイミダゾール−5−イル]−N−メチル−N'−(1−メチルエチル)尿素、(−)−N−[1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−1H−ベンズイミダゾール−5−イル]−N−メチル−N'−(1−メチルエチル)尿素および(+)−N−[1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−1H−ベンズイミダゾール−5−イル]−N−メチル−N'−(1−メチルエチル)尿素
1,2−ジクロロエタン(25ml)中の1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−N−メチル−1H−ベンズイミダゾール−5−アミン(523.0mg、1.20ミリモル)の溶液に、室温でイソプロピルイソシアネート(1.02g、12ミリモル)を添加した。混合物を60℃で14時間加熱した。濃縮後、残存物をシリカゲル上のEtOAcを用いたMPLCにより精製し、明黄色の固体として得られた所望の生成物(ラセミ体)477.9mg(92%)を白色固体のTFA塩に変換した。
1H-NMR (400 MHz, CD3OD) : δ0.27 (m, 1H), 0.51 (m, 2H), 0.60 (m, 1H), 1.08 (m, 1H), 1.15 (d, J= 6.4 Hz, 6 H), 1.39 (t, J= 7.0 Hz, 3H), 1.90 (d, J= 7.1 Hz, 3H), 3.35 (s, 3H), 3.97 (sep, J= 6.7 Hz, 1H), 4.04 (q, J= 7.0 Hz, 2H), 4.26 (dd, J= 14.8, 7.0 Hz, 1H), 4.38 (dd, J= 15.0, 7.2 Hz, 1H), 4.89 (q, J= 7.0 Hz, 1H), 6.97 (d, J = 8.8 Hz, 2H), 7.26 (d, J= 8.6 Hz, 2H), 7.52 (dd, J= 8.6, 1.8 Hz, 1H), 7.71 (s, 1H), 7.91 (d, J = 9.0 Hz, 1H)。MS (ESI) (M+H)+= 435.44 (M+1)+
分析値(C26H34N4O2+1.20 TFA+0.10 H2Oとしての):
計算値: C, 59.51; H, 6.22; N, 9.77。
実測値: C, 59.64; H, 6.22; N, 9.53。
【0236】
ラセミ混合物(rac)−N−[1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−1H−ベンズイミダゾール−5−イル]−N−メチル−N'−(1−メチルエチル)尿素はヘキサン/iPrOH(9:1)を用いたADキラルカラムにより分離した。
【0237】
エナンチオマー:(−)−N−[1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−1H−ベンズイミダゾール−5−イル]−N−メチル−N'−(1−メチルエチル)尿素:221.2mg(40%)、TFA塩、白色固体、[α]D−11.7°(c0.25,EtOH)。
1H-NMR (400 MHz, CD3OD) : δ0.27 (m, 1H), 0.51 (m, 2H), 0.60 (m, 1H), 1.08 (m, 1H), 1.15 (d, J= 6.4 Hz, 6 H), 1.39 (t, J= 7.0 Hz, 3H), 1.90 (d, J= 7.1 Hz, 3H), 3.35 (s, 3H), 3.97 (sep, J= 6.7 Hz, 1H), 4.04 (q, J= 7.0 Hz, 2H), 4.26 (dd, J= 14.8, 7.0 Hz, 1H), 4.38 (dd, J= 15.0, 7.2 Hz, 1H), 4.89 (q, J= 7.0 Hz, 1H), 6.97 (d, J = 8.8 Hz, 2H), 7.26 (d, J= 8.6 Hz, 2H), 7.52 (dd, J= 8.6, 1.8 Hz, 1H), 7.71 (s, 1H), 7.91 (d, J = 9.0 Hz, 1H)。MS (ESI) (M+H)+= 435.44 (M+1)+
分析値(C26H34N4O2+1.20 TFA+0.10 H2Oとしての):
計算値: C, 59.51; H, 6.22; N, 9.77。
実測値: C, 59.64; H, 6.22; N, 9.53。
【0238】
エナンチオマー:(+)−N−[1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)エチル]−1H−ベンズイミダゾール−5−イル]−N−メチル−N'−(1−メチルエチル)尿素:186.4mg(34%)、TFA塩、白色固体、[α]D+12.2°(c0.27,EtOH)。
1H NMR (400 MHz, CD3OD) : δ 0.27 (m, 1H), 0.51 (m, 2H), 0.60 (m, 1H), 1.08 (m, 1H), 1.15 (dd, J= 6.6, 1.6 Hz, 6 H), 1.39 (t, J= 7.0 Hz, 3H), 1.90 (d, J= 7.2 Hz, 3H), 3.35 (s, 3H), 3.97 (sep, J= 6.6 Hz, 1H), 4.04 (q, J= 7.0 Hz, 2H), 4.26 (dd, J= 15.0, 7.2 Hz, 1H), 4.39 (dd, J= 15.0, 6.8 Hz, 1H), 4.90 (q, J= 7.2 Hz, 1H), 6.97 (m, 2H), 7.26 (m, 2H), 7.51 (dd, J= 9.0, 2.0 Hz, 1H), 7.71 (d, J= 1.8, 1H), 7.91 (d, J = 9.0 Hz, 1H)。MS (ESI) (M+H)+= 435.46 (M+1)+
分析値(C26H34N4O2+1.10 TFA+0.20 H2Oとしての):
計算値: C, 60.10; H, 6.35; N, 9.94。
実測値: C, 60.02; H, 6.28; N, 10.07。
【0239】
実施例56
N−[1−(シクロヘキシルメチル)−2−[1−(4−エトキシフェニル)エチル]−1H−ベンズイミダゾール−5−イル]−N−メチル−N'−(1−メチルエチル)−尿素
56A:[4−[(シクロヘキシルメチル)アミノ]−3−ニトロフェニル]−メチルエステルカルバミン酸
4:1エタノール:水(40ml+10ml)中のメチル4−フルオロ−3−ニトロフェニルカーバメート(3g、14ミリモル)の攪拌混合物に、室温でシクロヘキシルメチルアミン(3.6ml、28ミリモル)を添加した。反応混合物を一夜60℃で加熱し、室温に冷却した。水(20ml)を混合物に添加し、深橙色の固体を溶液から析出させ、所望の生成物として収集した(6g、100%)。MS(ESI)(M+H)+:308.32(M+1)+
【0240】
56B:[3−アミノ−4−[(シクロヘキシルメチル)アミノ]フェニル]−メチルエステルカルバミン酸
[4−[(シクロヘキシルメチル)アミノ]−3−ニトロフェニル]−メチルエステルカルバミン酸を6時間30〜40psiで10%Pd/Cで触媒しながら酢酸エチル中で水素化した。反応混合物をセライトで濾過し、溶媒を除去し、暗紫色固体として所望の生成物を得た(2.02g、37%)。MS(ESI)(M+H)+:278.30(M+1)
【0241】
56C:[1−(シクロヘキシルメチル)−2−[1−(4−エトキシフェニル)エチル]−1H−ベンズイミダゾール−5−イル]−メチルエステルカルバミン酸
乾燥DMF(24ml)中の[3−アミノ−4−[(シクロヘキシルメチル)アミノ]フェニル]−メチルエステルカルバミン酸(2.02g、7.3ミリモル)、4−エトキシ−α−メチルベンゼン酢酸(1.4g、7.3ミリモル)およびジイソプロピルエチルアミン(2.2ml、12.4ミリモル)の攪拌溶液に、HATU)3.1g、8.1ミリモル)を室温で1回で添加した。溶液をCH2Cl2と水との間に分配し、抽出した(3×30ml)。合わせた有機層を塩水(30ml)で洗浄し、Na2SO4上に乾燥し、濾過し、濃縮した。残存物を酢酸(180ml)に溶解し、一夜80℃に加熱した。溶媒を蒸発させ、残存物を酢酸エチル(200ml)に溶解し、2NNaOH、塩水で洗浄し、Na2SO4上に乾燥した。混合物を濾過し、濃縮して黄色泡状物として標題化合物を得た(2.44g、77%)。MS(ESI)(M+H)+=436.42(M+1)+
【0242】
56D:1−(シクロヘキシルメチル)−2−[1−(4−エトキシフェニル)エチル]−N−メチル−1H−ベンズイミダゾール−5−アミン
Et2O−MeOH(100ml、化合物を溶解するのに十分な量のみのMeOH)中の[1−(シクロヘキシルメチル)−2−[1−(4−エトキシフェニル)エチル]−1H−ベンズイミダゾール−5−イル]−メチルエステルカルバミン酸(2.44g、5.6ミリモル)の溶液に、Et2O中のHClの1M溶液を沈殿が形成されなくなるまで(6ml)滴加した。溶媒を真空下に除去した。HCl塩をEt2O(120ml)およびTHF(60ml)中に溶解し、混合物を0℃まで冷却し、LiAlH4(986mg、25.2ミリモル)を1回で添加した。溶液をゆっくり室温に加温し、一夜攪拌し、その後、−78℃まで冷却し、MeOH(12ml)および水(12ml)でクエンチングし、室温まで加温し、Na2SO4(25g)を添加し、3時間室温で攪拌した。セライトで濾過し、酢酸エチルで洗浄し、濃縮することにより、茶色泡状物として標題化合物を得た(2.1g、96%)。MS(ESI)(M+H)+=392.46(M+1)+
【0243】
56E:N−[1−(シクロヘキシルメチル)−2−[1−(4−エトキシフェニル)エチル]−1H−ベンズイミダゾール−5−イル]−N−メチル−N'−(1−メチルエチル)−尿素
1,2−ジクロロエタン(270ml)中の1−(シクロヘキシルメチル)−2−[1−(4−エトキシフェニル)エチル]−N−メチル−1H−ベンズイミダゾール−5−アミン(2.1g、5.4ミリモル)の溶液に、室温でイソプロピルイソシアネート(1.1ml、10.8ミリモル)を添加し、反応混合物を一夜60℃で加熱した。溶液を室温に冷却し、溶媒を蒸発させ、茶色の残存物をMPLC(酢酸エチル、シリカゲル上)により精製し、ベージュ色の泡状物として標題化合物を得た(1.5g、58%)。
1H NMR (400 MHz, CD3OD) δ0.95-1.18 (m, 11H), 1.36 (t, J=7.0 Hz, 3H), 1.41-1.68 (m, 6H), 1.82 (d, J=7.0 Hz, 2H), 3.31 (s, 3H), 3.89-3.95 (m, 1H), 4.01 (apq, J=7.0. Hz, 2H), 4.13-4.18 (m, 1H), 4.68 (q, J=7.2 Hz, 1H), 7.17-7.20 (m, 2H), 7.35 (dd, J=2.0, 8.8 Hz, 1H), 7.63 (d, J=2.0 Hz, 1H), 7.71 (d, J=8.8 Hz, 1H)。MS (ESI) (M+H)+= 477.48 (M+1)+
分析値(C29H40N4O2+ 0.5 HC1 + 0.8 CH3OHとしての):
計算値: C, 68.76; H, 8.46; N, 10.26。
実測値: C, 68.75; H, 8.61; N, 10.98。
【0244】
実施例57
2−[(4−エトキシフェニル)メチル]−N,N−ジエチル−3−[(5−ニトロ−2−チエニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−カルボキサミド57A:N,N−ジエチル−5−ニトロ−6−(2−プロペニルアミノ)−3−ピリジンカルボキサミド
室温のメタノール(70ml)中の6−クロロ−5−ニトロ−3−ピリジンカルボン酸(4.72g、23.30ミリモル)の溶液にアリルアミン(5.25ml、70.0ミリモル)を添加し、混合物を一夜攪拌した。次に反応混合物を真空下に濃縮し、残存物を水(100ml)に溶解した。1MHCl水溶液を添加することにより溶液をpH3とする。得られた懸濁液をEtOAc(50ml)で抽出した。水層を更にEtOAc(2×50ml)で逆抽出した。有機層を合わせ、MgSO4上に乾燥し、濾過した。溶液を真空下に濃縮し、得られた5−ニトロ−6−(2−プロペニルアミノ)−3−ピリジンカルボン酸を更に精製することなく用いた。
【0245】
この残存物をジエチルアミン(100ml)に溶解した。この溶液にHATU(9.30g、24.47ミリモル)を添加した。混合物を48時間室温で攪拌した。次に反応混合物を真空下に濃縮し、残存物をNaHCO3飽和水溶液(100ml)およびEtOAc(100ml)に溶解した。層を分離させ、水層を更にEtOAc(2×50ml)で逆抽出した。有機層を合わせ、MgSO4上に乾燥し、濾過し、真空下に濃縮した。残存物をシリカゲルフラッシュクロマトグラフィー(CH2Cl2中[2%MeOH+1%NH4OH水溶液])で精製し、標題化合物、N,N−ジエチル−5−ニトロ−6−(2−プロペニルアミノ)−3−ピリジンカルボキサミド4.83g(6−クロロ−5−ニトロ−3−ピリジンカルボン酸から74.5%収率)を得た。
1H-NMR (400 MHz, CDCl3) : δ1.26 (m, 6H), 3.28 (br s, 1H), 3.47 (m, 4H), 4.26 (m, 2H), 5.22 (m, 1H), 5.30 (m, 1H), 7.40 (d, J= 8.2 Hz, 1H), 7.70 (d, J= 8.2 Hz, 1H)。MS (ESI) (M+H)+: 279。
【0246】
57B:5−アミノ−N,N−ジエチル−6−(2−プロペニルアミノ)−3−ピリジンカルボキサミド
室温のDMF(50ml)中のN,N−ジエチル−5−ニトロ−6−(2−プロペニルアミノ)−3−ピリジンカルボキサミド(4.83g、17.25ミリモル)の溶液に、2塩化スズ2水和物(8.56g、37.95ミリモル)を添加した。混合物を80℃で一夜攪拌した。反応混合物を室温とし、真空下に濃縮した。残存物をNaHCO3飽和水溶液(100ml)およびEtOAc(100ml)に溶解した。懸濁液を濾過して層を分離させた。水層を更にEtOAc(100ml)で逆抽出した。有機層を合わせ、MgSO4上に乾燥し、濾過し、真空下に濃縮した。残存物をシリカゲルフラッシュクロマトグラフィー(CH2Cl2中[5%MeOH+1%NH4OH水溶液])で精製し、標題化合物、5−アミノ−N,N−ジエチル−6−(2−プロペニルアミノ)−3−ピリジンカルボキサミド2.10g(N,N−ジエチル−5−ニトロ−6−(2−プロペニルアミノ)−3−ピリジンカルボキサミドから49.0%収率)を得た。
1H-NMR (400 MHz, CDCl3) : δ1.20 (t, J= 7.2 Hz, 6H), 3.23 (br s, 1H), 3.45 (m, 4H), 4.12 (m, 2H), 4.44 (br s, 2H), 5.17 (d, J= 12.5 Hz, 1H), 5.26 (d, J= 17.2 Hz, 1H), 6.04 (m, 1H), 7.00 (d, J= 2.0 Hz, 1H), 7.83 (d, J= 2.0 Hz, 1H)。MS (ESI) (M+H)+: 2.49。
【0247】
57C:5−[[(4−エトキシフェニル)アセチル]アミノ]−N,N−ジエチル−6−(2−プロペニルアミノ)−3−ピリジンカルボキサミド
0℃のジクロロメタン(50ml)中の5−アミノ−N,N−ジエチル−6−(2−プロペニルアミノ)−3−ピリジンカルボキサミド(1.61g、6.50ミリモル)の溶液に、4−エトキシ−ベンゼンアセチルクロリド(1.35g、6.80ミリモル)を添加した。混合物を室温で3時間攪拌した。次に反応混合物をNaHCO3飽和水溶液(100ml)でクエンチングし、ジクロロメタン(50ml)で抽出した。水層を更にジクロロメタン(2×50ml)で逆抽出した。有機層を合わせ、MgSO4上に乾燥し、濾過し、真空下に濃縮した。残存物をシリカゲルフラッシュクロマトグラフィー(CH2Cl2中[2%MeOH+0.5%NH4OH水溶液])で精製し、標題化合物、5−[[(4−エトキシフェニル)アセチル]アミノ]−N,N−ジエチル−6−(2−プロペニルアミノ)−3−ピリジンカルボキサミド1.69g(5−アミノ−N,N−ジエチル−6−(2−プロペニルアミノ)−3−ピリジンカルボキサミドから63.3%)を得た。
1H-NMR (400 MHz, CDCl3) : δ1.18 (t, J= 7.2 Hz, 6H), 1.41 (t, J= 7.8 Hz, 3H), 3.42 (br s, 1H), 3.69 (s, 2H), 4.02 (m, 8H), 5.13 (m, 2H), 5.92 (m, 1H), 6.90 (m, 2H), 7.27 (m, 2H), 7.34 (m, 1H), 8.00 (m, 1H)。MS (ESI) (M+H)+: 411。
【0248】
57D:6−アミノ−5−[[(4−エトキシフェニル)アセチル]アミノ]−N,N−ジエチル−3−ピリジンカルボキサミド
室温のジクロロメタン(20ml)中の5−[[(4−エトキシフェニル)アセチル]アミノ]−N,N−ジエチル−6−(2−プロペニルアミノ)−3−ピリジンカルボキサミド(1.04g、2.53ミリモル)の脱気溶液に、パラジウムテトラキス(117mg、0.10ミリモル)、ついで酢酸(580μL、10.14ミリモル)およびフェニルシラン(625μL、5.07ミリモル)を添加した。混合物を6時間攪拌した。次に反応混合物をNaHCO3飽和水溶液(50ml)でクエンチングし、EtOAc(20ml)で抽出した。水層を更にジクロロメタン(2×20ml)で逆抽出した。有機層を合わせ、MgSO4上に乾燥し、濾過し、真空下に濃縮した。残存物をシリカゲルフラッシュクロマトグラフィー(CH2Cl2中[3%MeOH+1%NH4OH水溶液])で精製し、標題化合物、6−アミノ−5−[[(4−エトキシフェニル)アセチル]アミノ]−N,N−ジエチル−3−ピリジンカルボキサミド705mg(5−[[(4−エトキシフェニル)アセチル]アミノ]−N,N−ジエチル−6−(2−プロペニルアミノ)−3−ピリジンカルボキサミドから75.2%)を得た。
1H-NMR (400 MHz, CDCl3) : δ1.18 (br s, 6H), 1.43 (t, J= 7.0 Hz, 3H), 3.42 (br s, 4H), 3.69 (s, 2H), 4.04 (q, J= 7.0 Hz, 2H), 4.73 (s, 2H), 6.91 (d, J= 8.6 Hz,2H), 7.26 (d, J = 8.6 Hz, 2H), 7.38 (m, 1H), 7.78 (s, 1H), 7.95 (m, 1H)。MS (ESI) (M+H)+: 372。
【0249】
57E:2−[(4−エトキシフェニル)メチル]−N,N−ジエチル−3−[(5−ニトロ−2−チエニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−カルボキサミド
室温のジクロロエタン(0.5ml)および酢酸(0.5ml)中の6−アミノ−5−[[(4−エトキシフェニル)アセチル]アミノ]−N,N−ジエチル−3−ピリジンカルボキサミド(30mg、0.08ミリモル)の溶液に、5−ニトロー2−チオフェンカルボキシアルデヒド(19mg、0.12ミリモル)を添加した。混合物を4.5時間攪拌した。BH3・ピリジン(8.2μL、0.08ミリモル)を添加し、反応混合物を84℃とした。一夜攪拌した後、混合物を室温に冷却し、5−ニトロ−2−チオフェンカルボキシアルデヒド(19mg、0.12ミリモル)を添加した。混合物を5時間攪拌した。BH3・ピリジン(8.2μL、0.08ミリモル)を添加し、反応混合物を84℃とした。一夜攪拌した後、1MNaOH水溶液(20ml)を添加することにより反応をクエンチングし、EtOAc(20ml)で抽出した。水層を更にジクロロメタン(2×20ml)で逆抽出した。有機層を合わせ、MgSO4上に乾燥し、濾過し、真空下に濃縮した。残存物をシリカゲルフラッシュクロマトグラフィー(CH2Cl2中[3%MeOH+0.5%NH4OH水溶液])で精製し、標題化合物、2−[(4−エトキシフェニル)メチル]−N,N−ジエチル−3−[(5−ニトロ−2−チエニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−カルボキサミド(純度:215nmで>84%、254nmで>81%、280nmで>68%)を得た。
1H-NMR (400 MHz, CDCl3) : δ1.23 (m, 6H), 1.40 (t, J= 6.8 Hz, 3H), 3.36 (br s, 2H), 3.60 (br s, 2H), 3.98 (q, J= 6.8 Hz, 2H), 4.29 (s, 2H), 4.84 (s, 2H), 6.80 (d, J= 8.6 Hz, 2H), 7.07 (d, J = 8.6 Hz, 2H), 7.66 (d, J= 4.1 Hz, 1H), 7.77 (d, J= 4.1 Hz, 1H), 8.03 (d, J= 2.0 Hz, 1H), 8.03 (d, J= 2.0 Hz, 1H)。MS (ESI) (M+H)+: 494。
【0250】
実施例58
3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−N−メチル−3H−イミダゾ[4,5−b]ピリジン−6−アミン
58A:N−(シクロプロピルメチル)−3,5−ジニトロ−2−ピリジンアミン
水浴中で室温に維持したジクロロメタン(10ml)中の2−クロロ−3,5−ジニトロ−ピリジン(1.00、4.91ミリモル)の溶液に、シクロプロピルメチルアミン(852μL、9.83ミリモル)を滴加した。添加後、即座に橙色の着色が観察され、沈殿が検出された。混合物を1時間攪拌した。1MNaOH水溶液(10ml)で反応をクエンチングし、EtOAc(20ml)で抽出した。有機層を塩水で洗浄し、MgSO4上に乾燥し、濾過し、真空下に濃縮した。工程により標題化合物、N−(シクロプロピルメチル)−3,5−ジニトロ−2−ピリジンアミン1.117g(2−クロロ−3,5−ジニトロ−ピリジンより96%)が得られ、純度はHPLC分析によれば>96%であった。残存物を更に精製することなく用いた。
1H-NMR (400 MHz, CDCl3) : δ0.36 (m, 2H), 0.66 (m, 2H), 1.18 (m, 1H), 3.61 (dd, J= 5.3, 7.2 Hz, 2H), 8.85 (m, 1H), 9.23 (m, 2H)。MS (ESI) (M+H)+: 239。
【0251】
58B:N2−(シクロプロピルメチル)−5−ニトロ−2,3−ピリジンジアミン
室温のEtOAc(50ml)中のN−(シクロプロピルメチル)−3,5−ジニトロ−2−ピリジンアミン(1.17g、4.92ミリモル)の溶液にPd/C(394mg、0.25ミリモル、10%等級)を添加した。混合物を35psiの水素圧力下のParr装置内に入れた。混合物を一夜振とうした。反応混合物をセライトで濾過し、真空下に濃縮した。残存物をシリカゲルフラッシュクロマトグラフィー(CH2Cl2中[2.5%MeOH+1%NH4OH水溶液])で精製し、標題化合物、N2−(シクロプロピルメチル)−5−ニトロ−2,3−ピリジンジアミン792mg(N−(シクロプロピルメチル)−3,5−ジニトロ−2−ピリジンアミンから77.3%)を得た。
1H-NMR (400 MHz, CDCl3) : δ0.31 (m, 2H), 0.61 (m, 2H), 1.14 (m, 1H), 3.34 (br s, 2H), 3.42 (dd, J= 5.3, 7.2 Hz, 2H), 5.15 (br s, 1H), 7.62 (d, J= 2.5 Hz, 1H), 8.73 (d, J= 2.5 Hz, 2H)。MS (ESI) (M+H)+: 209。
【0252】
58C:3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−6−ニトロ−3H−イミダゾ[4,5−b]ピリジン
室温のジクロロメタン(50mL)中のN2−(シクロプロピルメチル)−5−ニトロ−2,3−ピリジンジアミン(792mg、3.80ミリモル)の溶液に、4−エトキシ−ベンゼンアセチルクロリド(795g、4.00ミリモル)を添加した。混合物を10時間攪拌した。混合物を真空下に濃縮し、残存物をジクロロエタン(25ml)および酢酸(25ml)に溶解した。混合物を85℃で48時間攪拌した。次に反応混合物を室温に冷却し、1MNaOH水溶液を添加することによりpH10とした。混合物をEtOAc(50ml)で抽出した。水層を更にEtOAc(2×50ml)で逆抽出した。有機層を合わせ、MgSO4上に乾燥し、濾過し、真空下に濃縮した。残存物をシリカゲルフラッシュクロマトグラフィー(CH2Cl2中[2.5%MeOH+0.5%NH4OH水溶液])で精製し、標題化合物、3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−6−ニトロ−3H−イミダゾ[4,5−b]ピリジン1.02g(N2−(シクロプロピルメチル)−5−ニトロ−2,3−ピリジンジアミンから76.0%)を得た。
1H-NMR (400 MHz, CDCl3) : δ0.44 (m, 2H), 0.52 (m, 2H), 1.10 (m, 1H), 1.40 (t, J= 6.8 Hz, 3H), 4.01 (q, J= 6.8Hz, 2H), 4.10 (d, J=7.2Hz, 2H), 4.35 (s, 2H), 6.86(d, J=8.8Hz, 2H), 7.18 (d, J=8.8Hz, 2H), 8.80 (d, J= 2.3 Hz, 1H), 9.26 (d, J= 2.3 Hz, 1H)。MS (ESI) (M+H)+: 353。
【0253】
58D:3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−アミン
室温のEtOAc(20ml)および酢酸(1ml)中の3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−6−ニトロ−3H−イミダゾ[4,5−b]ピリジン(1.35g、3.84ミリモル)の溶液に、Pd/C(308mg、10%等級)を添加した。混合物を35psiの水素圧力下のParr装置内に入れた。混合物を72時間振とうした。反応混合物をセライトで濾過した。濾液を1MNaOH水溶液(25ml)およびEtOAc(50mL)に溶解し、層を分離させた。水層を更にEtOAc(2×50ml)で逆抽出した。有機層を合わせ、MgSO4上に乾燥し、濾過し、真空下に濃縮した。工程により標題化合物、3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−アミン1.18g(3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−6−ニトロ−3H−イミダゾ[4,5−b]ピリジンから95%収率)が得られ、純度はHPLC分析によれば>95%であった。残存物を更に精製することなく用いた。
1H-NMR (400 MHz, CDCl3) : δ0.35 (m, 2H), 0.46 (m, 2H), 1.11 (m, 1H), 1.39 (t, J= 6.8 Hz, 3H), 3.26 (br s, 2H), 3.98 (m, 4H), 4.25 (s, 2H), 6.83 (d, J= 8.8 Hz, 2H), 7.16 (d, J= 8.8 Hz, 2H), 7.34 (d, J= 2.3 Hz, 1H), 7.87 (d, J= 2.3 Hz, 1H)。MS (ESI) (M+H)+: 323。
【0254】
58E:[3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−イル]−カルバミン酸メチルエステル
0℃のジクロロメタン(20ml)中の3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−アミン(1.18g、3.36ミリモル)の溶液に、Hunig塩基(869μL、4.99ミリモル)、次いでクロロギ酸メチル(326μL、4.22ミリモル)を添加した。混合物を室温とし、一夜攪拌した。NH4Cl飽和水溶液で反応をクエンチングし、ジクロロメタン(50ml)で抽出した。
【0255】
水層を更にジクロロメタン(2×50ml)で逆抽出した。有機層を合わせ、MgSO4上に乾燥し、濾過し、真空下に濃縮した。残存物をシリカゲルフラッシュクロマトグラフィー(CH2Cl2中[3〜7%MeOH+1%NH4OH水溶液])で精製し、標題化合物、[3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−イル]−カルバミン酸メチルエステル1.02g(3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−アミンから73.3%収率)を得た。
1H-NMR (400 MHz, CDCl3) : δ0.38 (m, 2H), 0.45 (m, 2H), 1.11 (m, 1H), 1.39 (t, J= 7.0 Hz, 3H), 3.81 (s, 3H), 4.00 (m, 4H), 4.29 (s, 2H), 6.69 (br s, 1H), 6.84 (d, J= 8.6 Hz, 2H), 7.15 (d, J = 8.6 Hz, 2H), 8.13 (br s, 1H), 8.26 (br s, 1H)。MS (ESI) (M+H)+: 381。
【0256】
58F:3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−N−メチル−3H−イミダゾ[4,5−b]ピリジン−6−アミン
室温のジクロロメタン(20ml)中の[3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−イル]−カルバミン酸メチルエステル(550mg、1.46ミリモル)の溶液に、ジエチルエーテル中1Mの塩酸溶液(3ml)を添加した。混合物を10分間攪拌し、真空下に濃縮した。残存物をTHF(15ml)およびBジエチルエーテル(30mL)に溶解し、0℃に冷却した。LAH(137mg、3.61ミリモル)を溶液に添加した。混合物を一夜攪拌した。次に反応混合物を−78℃に冷却し、MeOH(3.20ml)および水(3.20ml)でクエンチングした。Na2SO4を混合物に添加し、これをゆっくり室温まで戻した。混合物をセライトで濾過し、真空下に濃縮した。残存物をシリカゲルフラッシュクロマトグラフィー(CH2Cl2中[3.5%MeOH+0.5%NH4OH水溶液])で精製し、標題化合物、3−(シクロプロピルメチル−2−[(4−エトキシフェニル)メチル]−N−メチル−3H−イミダゾ[4,5−b]ピリジン−6−アミン445mg([3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−イル]−カルバミン酸メチルエステルから90.6%収率)を得た。
1H-NMR (400 MHz, CDCl3) : δ0.35 (m, 2H), 0.46 (m, 2H), 1.11 (m, 1H), 1.39 (t, J= 7.0 Hz, 3H), 2.90 (s, 3H), 3.98 (m, 4H), 4.25 (s, 2H), 6.83 (d, J= 8.8 Hz, 2H), 7.15 (d, J= 8.8 Hz, 2H), 7.23 (d, J= 2.5 Hz, 1H), 7.83 (d, J = 2.5 Hz, 1H)。MS(ESI) (M+H)+: 337。
【0257】
実施例59
N−[3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−イル]−N,3−ジメチルブタンアミド
室温のジクロロエタン(17ml)中の3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−N−メチル−3H−イミダゾ[4,5−b]ピリジン−6−アミン(143.6mg、0.43ミリモル)の溶液に、トリエチルアミン(300μL,2.15ミリモル)、次いでイソバレリルクロリド(156μl、1.28ミリモル)を添加した。溶液を一夜攪拌した。反応をNaHCO3飽和水溶液(10ml)でクエンチングし、EtOAc(25ml)で抽出した。水層を更にEtOAc(25ml)で逆抽出した。有機層を合わせ、MgSO4上に乾燥し、濾過し、真空下に濃縮した。残存物を分取HPLC(C−18カラム、0.1%TFA水溶液中10〜70%[AcCNの0.1%TFA溶液]により精製し、標題化合物、N−[3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−イル]−N,3−ジメチルブタンアミドのTFA塩95.5g(3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−N−メチル−3H−イミダゾ[4,5−b]ピリジン−6−アミンから41.5%収率)を得た。
1H-NMR (400 MHz, d3-MeOD): δ0.45 (m, 4H), 0.82 (m, 6H), 1.17 (m, 1H), 1.36 (t, J = 7.0 Hz, 3H), 2.00 (m, 2H), 3.32 (s, 3H), 4.00 (t, J = 7.0 Hz, 2H), 4.22 (d, J = 7.2 Hz, 2H), 4.44 (s, 2H), 6.90 (d, J = 8.6 Hz, 2H), 7.23 (d, J = 8.6 Hz, 2H), 7.97 (d, J = 2.15 Hz, 1H), 8.33 (br s, 1H)。MS (ESI) (M+H)+: 421。
【0258】
実施例60
N−[3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−イル]−N−メチル−N1−(1−メチルエチル)−尿素
室温のDMF(20ml)中の3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−N−メチル−3H−イミダゾ[4,5−b]ピリジン−6−アミン(163.4mg、0.49ミリモル)の溶液に、イソプロピルイソシアネート(48μL,0.49ミリモル)を添加した。混合物を50℃で72時間攪拌した。反応混合物のHPLC分析によれば出発物質が存在していた。従って、更にイソプロピルイソシアネート(144μL、1.47ミリモル)を添加した。得られた混合物を50℃で12時間攪拌した。次に反応混合物を水(150ml)およびEtOAc(150ml)に溶解した。水層を更にEtOAc(100ml)で逆抽出した。有機層を合わせ、MgSO4上に乾燥し、濾過し、真空下に濃縮した。残存物を分取HPLC(C−18カラム、0.1%TFA水溶液中10〜70%[AcCNの0.1%TFA溶液]により精製し、標題化合物、N−[3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−イル]−N−メチル−N1−(1−メチルエチル)−尿素のTFA塩92mg(3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−N−メチル−3H−イミダゾ[4,5−b]ピリジン−6−アミンから35.0%収率)を得た。
1H-NMR (400 MHz, d3-MeOD) : δ0.46 (m, 4H), 1.09 (d, J = 6.6 Hz, 6H), 1.18 (m, 1H), 1.36 (t, J = 7.0 Hz, 3H), 3.30 (s, 3H), 3.92 (m, 1H), 4.00 (t, J = 7.0 Hz, 2H), 4.22 (d, J = 7.2 Hz, 2H), 4.44 (s, 2H), 6.90 (d, J = 8.6 Hz, 2H), 7.22 (d, J= 8. 6 Hz, 2H), 7.93 (d, J = 2.2 Hz, 1H), 8.34 (d, J = 2.2 Hz, 1H)。MS (ESI) (M+H)+: 422。
【0259】
実施例61
N−[3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−イル]−N−メチル−ベンゼンスルホンアミド
室温のアセトニトリル(5ml)中の3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−N−メチル−3H−イミダゾ[4,5−b]ピリジン−6−アミン(237.0mg、0.70ミリモル)の溶液に、トリエチルアミン(196μL,1.41ミリモル)、次いでベンゼンスルホニルクロリド(156μL、0.92ミリモル)を添加した。混合物を一夜攪拌した。反応混合物を真空下に濃縮した。残存物をEtOAc(10ml)およびNa2CO3飽和水溶液(10ml)に溶解した。層を分離させ、水層をEtOAc(10ml)で逆抽出した。有機層を合わせ、MgSO4上に乾燥し、濾過し、真空下に濃縮した。残存物を分取HPLC(C−18カラム、0.1%AcOH水溶液中20〜80%[AcCNの0.1%AcOH溶液]により精製し、標題化合物、N−[3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−イル]−N−メチル−ベンゼンスルホンアミドのAcOH塩63mg(3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−N−メチル−3H−イミダゾ[4,5−b]ピリジン−6−アミンから17.0%収率)を得た。
1H-NMR (400 MHz, d3-MeOD) : δ0.37 (m, 2H), 0.42 (m, 2H), 1.10 (m, 1H), 1.35 (t,J = 7.0 Hz, 3H), 3.31 (s, 3H), 3.99 (t, J = 7.0 Hz, 2H), 4.10 (d, J = 7.2 Hz, 2H), 4.32 (s, 2H), 6.86 (d, J=8.6Hz, 2H), 7.17 (d, J=8.6Hz, 2H), 7.55 (m, 2H), 7.57 (m, 2H), 7.59 (m, 1H), 7.70 (m, 1H), 8.11 (d, J = 2.2 Hz, 1H)。MS (ESI) (M+H)+: 477。
【0260】
実施例62
N−[3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−イル]−N−メチル−チオフェンスルホンアミド
室温のアセトニトリル(5ml)中の3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−N−メチル−3H−イミダゾ[4,5−b]ピリジン−6−アミン(250.0mg、0.74ミリモル)の溶液に、トリエチルアミン(207μL,1.49ミリモル)、次いで2−チオフェンスルホニルクロリド(176μL、0.96ミリモル)を添加した。混合物を一夜攪拌した。反応混合物を真空下に濃縮した。残存物をEtOAc(10ml)およびNa2CO3飽和水溶液(10ml)に溶解した。層を分離させ、水層をEtOAc(10ml)で逆抽出した。有機層を合わせ、MgSO4上に乾燥し、濾過し、真空下に濃縮した。残存物を分取HPLC(C−18カラム、0.1%AcOH水溶液中20〜80%[AcCNの0.1%AcOH溶液]により精製し、標題化合物、N−[3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−3H−イミダゾ[4,5−b]ピリジン−6−イル]−N−メチル−チオフェンスルホンアミドのAcOH塩72mg(3−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−N−メチル−3H−イミダゾ[4,5−b]ピリジン−6−アミンから18.0%収率)を得た。
1H-NMR (400 MHz, d3-MeOD) : δ0.37 (m, 2H), 0.43 (m, 2H), 1.10 (m, 1H), 1.35 (t,J = 7.0 Hz, 3H), 3.32 (s, 3H), 3.99 (t, J = 7.0 Hz, 2H), 4.10 (d, J = 7.2 Hz, 2H), 4.32 (s, 2H), 6.86 (d, J = 8.8 Hz, 2H), 7.17 (d, J = 8.8 Hz, 2H), 7.20 (m, 1H), 7.44 (d, J = 5.3 Hz, 1H), 7.61 (d, J = 2.3 Hz, 1H), 7.85 (d, J = 5.1 Hz, 1H), 8.15 (d, J = 2.3 Hz, 1H)。MS (ESI) (M+H)+: 483。
【0261】
【表3】
Figure 2004528334
【0262】
【表4】
Figure 2004528334
【0263】
【表5】
Figure 2004528334
【0264】
実施例110
N−[1−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−1H−ベンズイミダゾール−5−イル]−N−メチル−1−ピペリジンカルボキサミド
MeCN(8ml)中の1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)メチル]−N−メチル−1H−ベンズイミダゾール−5−アミン(67.2mg、0.2ミリモル、実施例51AAに記載の操作法に従い製造)、DIPEA(51.7mg、0.4ミリモル)およびDMAP(5mg)の溶液に、ピペリジンカルボニルクロリド(44.3mg、0.3ミリモル)を室温で添加した。反応混合物を24時間還流下に加熱した。、H2O(50ml)でクエンチングし、EtOAc(4×20ml)で抽出した。合わせた有機層をNaCl水溶液洗浄し、Na2SO4上に乾燥した。濾過し、溶媒を蒸発させた後、残存物をシリカゲル上のEtOAcを用いたMPLCにより精製し、得られた無色のシロップ状物75.1mg(84%)を白色固体のTFA塩に変換した。
1H-NMR (CD3OD) : δ0.51 (m, 2H), 0.66 (m, 2H), 1.28 (m, 1H), 1.41 (m, 7H), 1.55 (m, 2H), 3.28 (s, 3H), 3.34 (m, 4H), 4.07 (q, J = 7.1 Hz, 2H), 4.39 (d, J= 7.2 Hz, 2H), 4.57 (s, 2H), 7.01 (m, 2H), 7.30 (m, 2H), 7.39 (dd, J= 9.0, 2.1 Hz, 1H),7.44 (d, J = 2.0 Hz, 1H), 7.90 (d, J= 9.0 Hz, 1H)。MS (ESI) (M+H)+= 447.36。
分析値(C27H34N4O2+0.90 TFA+0.60 H2Oとしての):
計算値: C, 61.77; H, 6.50; N, 10.00。
実測値: C, 61.90; H, 6.65; N, 9.79。
【0265】
実施例111
N−[1−(シクロプロピルメチル)−2−[(4−エトキシフェニル)メチル]−1H−ベンズイミダゾール−5−イル]−N−メチル−1−ピロリジンカルボキサミド
MeCN(8ml)中の1−(シクロプロピルメチル)−2−[1−(4−エトキシフェニル)メチル]−N−メチル−1H−ベンズイミダゾール−5−アミン(67.2mg、0.2ミリモル、実施例51AAに記載の操作法に従い製造)、DIPEA(51.7mg、0.4ミリモル)およびDMAP(5mg)の溶液に、ピロリジンカルボニルクロリド(40.1mg、0.3ミリモル)を室温で添加した。反応混合物を24時間還流下に加熱した。H2O(50ml)でクエンチングし、EtOAc(4×20ml)で抽出した。合わせた有機層をNaCl水溶液洗浄し、Na2SO4上に乾燥した。濾過し、溶媒を蒸発させた後、残存物をシリカゲル上のEtOAcを用いたMPLCにより精製し、得られた無色のシロップ状物79.4mg(92%)を白色固体のTFA塩に変換した。
1H NMR (CD3OD) : δ0.50 (m, 2H), 0.65 (m, 2H), 1.29 (m, 1H), 1.41 (t, J= 7.2 Hz,3H), 1.75 (m, 4H), 3.28 (s, 3H), 3.34 (m, 4H), 4.07 (q, J = 7.0 Hz, 2H), 4.39 (d, J= 7.2 Hz, 2H), 4.58 (s, 2H), 7.01 (m, 2H), 7.31 (m, 2H), 7.43 (dd, J= 9.0, 2.1 Hz, 1H), 7.48 (m, 1H), 7.91 (d, J = 8.8 Hz, 1H)。MS (ESI) (M+H)+= 433.34。
分析値(C26H32N4O2+0.90 TFA+0.20 H2Oとしての):
計算値: C, 61.97; H, 6.23; N, 10.40。
実測値: C, 62.01; H, 6.20; N, 10.04。【Technical field】
[0001]
The present invention relates to a new compound that becomes an agonist at the CB2 receptor and a salt thereof. The compounds are useful in therapy, particularly in the treatment of pain. The invention also relates to a method for the preparation of the new compounds, to pharmaceutical compositions containing them, and to the use of the compounds in therapy, in particular in the treatment of pain.
[Background Art]
[0002]
Two cannabinoid receptors are known, one is predominantly expressed in the central nervous system (CB1) and the other is located in the periphery and is mainly restricted to cells and tissues derived from the immune system (CB2) (Abood and Martin Int. Rev. of Naurobio. 39, 197-211, (1996)).
[0003]
Agonists and mixed agonists at the CB1 receptor are highly effective in an antinociceptive model in animals, but it is not known to what extent they can separate the desired analgesic effects from unwanted CNS side effects. These unwanted CNS side effects are known to be mediated by the CB1 receptor.
[0004]
Numerous reports point to a role for CB2 in pathophysiology. In particular, Munro et al. [Nature, 365, 61-64 (1993)] have found that CB2 receptor expression is induced under conditions of immune cell activation. [PNAS 96, 14228-14223 (1999)] recently provided evidence that CB2 agonists exhibit anti-inflammatory and peripheral analgesic activity. Furthermore, Mazzari et al. [Soc. Neurosci. Abstr. 23, 652 (1995)] report that CB2 activation suppresses mechanical hyperalgesia associated with nerve injury. These results indicate that the CB2 receptor is an interesting target for the discovery of new analgesics that are expected to eliminate the CB1-mediated side effects associated with conventional cannabinoid agonists such as tetrahydrocannabinol (THC). Is shown. Furthermore, because the CB2 receptor is localized to the periphery, selective CB2 agonists are likely to have centrally acting cannabi mimetic (CB1) or psychoactive side effects of opiate drugs and commonly known abuse. It is expected to reduce pain without danger.
[0005]
Analgesics discovered and present in the prior art have a number of disadvantages, including poor pharmacokinetics and loss of analgesic activity upon systemic administration.
DISCLOSURE OF THE INVENTION
[0006]
The compounds of the present invention have the following formula I:
Embedded image
Figure 2004528334
[Wherein, R1Is-(C1-C8) Alkyl,-(CTwo-C8) Alkenyl, RFour TwoN (C1-C6) Alkyl-, RFour TwoNC (= O) (C1-C6) Alkyl-, RFourO (C1-C6) Alkyl-, RFourOC (= O) (C1-C6) Alkyl-, RFourC (= O) (C1-C6) Alkyl-, RFourC (= O) NRFour(C1-C6) Alkyl-, RFour TwoNSOTwo(C1-C6) Alkyl-, RFourCSOTwoNRFour(C1-C6) Alkyl-, RFour TwoNC (= O) NRFour(C1-C6) Alkyl-, RFour TwoNSOTwoNRFour(C1-C6) Alkyl-, aryl (C1-C6) Alkyl, aroyl (C1-C6) Alkyl, heteroaryl (C1-C6) Alkyl, heteroaroyl (C1-C6) Alkyl, heterocycloalkyl (C1-C6) Alkyl, bicyclic heteroaryl (C1-C6) Alkyl and bicyclic heteroaroyl (C1-C6) Selected from the group consisting of alkyl;
R1The part is unsubstituted-(CTwo-C8-)-(C) unsubstituted or substituted with one or more moieties independently selected from the group consisting of halogen, cyano, acetoxymethyl and nitro1-C8) Alkyl;
Ar is an optionally substituted aryl moiety;
RTwoIs-(C) unsubstituted or substituted (on 1-6 carbons) with one or more fluorine substituents1-C6) Alkyl or (CThree-C6) Is cycloalkyl;
[0007]
RThreeIs:
Embedded image
Figure 2004528334
A portion selected from the group consisting of:
[0008]
RFourAre -H,-(C1-C6) Alkyl,-(CTwo-C6) Alkenyl and-(CTwo-C6) A moiety independently selected from the group consisting of alkynyl;
NRFour TwoIs NRFour TwoInclude compounds that form a heterocyclic ring system, such as pyrrole, piperidine, piperazine or pyrrolidinone;
RFiveThe parts are -H,-(C1-C6) Alkyl,-(CTwo-C6) Is independently selected from the group consisting of alkenyl and -heterocyclyl;
NRFive TwoIs NRFive TwoInclude compounds that form a heterocyclic ring system, such as pyrrole, piperidine, piperazine or pyrrolidinone;
R6The parts are -H,-(C1-C6) Alkyl,-(CTwo-C6) Alkenyl and-(C1-C6) Alkanoyl, heterocyclyl, heterocyclyl (C1-CThree) Alkyl, aryl, aryl (C1-CThree) Alkyl, heteroaryl, heteroaryl (C1-CThree) Alkyl, bicyclic heteroaryl and bicyclic heteroaryl (C1-CThree) Alkyl, independently selected from the group consisting of:
RFiveAnd R6Together form a 5- to 7-membered heterocycle, for example pyrrole, piperidine, piperazine, pyrrolidinone, homopiperazine or hexamethyleneimine;
X is -C (RFive)Two-, -NRFive-, C (= O)-, -CHTwo-CHTwo-, -CH = CH-, -O-, -C (R) (R ')-and -S (O)n-Selected from the group consisting of (where n = 0, 1 or 2), provided that R and R '= (C1-C6) Alkyl, OR ″ or H, and R ″ = H or (C1-C6) Alkyl; and
Y is C or N] and pharmaceutically acceptable salts thereof, and diastereomers and enantiomers and mixtures thereof.
[0009]
The term alkyl as used herein includes straight chain, molecular chain and cyclic substituents, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, t-butyl, cyclopropylmethyl and cyclopentyl. And the portion on the alkyl chain is amino (C1-C6) The alkyl can be anywhere on the chain such that it includes 1-aminopropyl and 2-aminopropyl.
[0010]
The term halogen, as used herein, includes fluorine, chlorine, bromine and iodine.
[0011]
The term aryl moiety encompasses aromatic carbocycles, 5-membered heteroaromatic ring systems, 6-membered heteroaromatic ring systems and bicyclic heteroaromatic ring systems.
[0012]
Aromatic carbocycles include phenyl and naphthyl.
[0013]
A 5-membered heteroaromatic ring system is a monocyclic aromatic ring system in which one, two or three of the ring atoms have five ring atoms independently selected from N, O and S.
[0014]
Preferably the 5-membered heteroaromatic ring system is thienyl, furyl, pyrrolyl, imidazolyl, thiazolyl, oxazolyl, pyrazolyl, isothiazolyl, isoxazolyl, 1,2,3-triazolyl, tetrazolyl, 1,2,3-thiadiazolyl, 1,2 1,3-oxadiazolyl, 1,2,4-triazolyl, 1,2,4-thiadiazolyl, 1,2,4-oxadiazolyl, 1,3,4-triazolyl, 1,3,4-thiadiazolyl and 1,3,4 -Selected from the group consisting of oxadiazolyl.
[0015]
A 6-membered heteroaromatic ring system is a monocyclic aromatic ring system having 6 ring atoms in which 1, 2 or 3 of the ring atoms are N.
[0016]
Preferably the 6-membered heteroaromatic ring system is selected from the group consisting of pyridyl, pyrazinyl, pyrimidinyl, triazinyl and pyridazinyl.
[0017]
Bicyclic heteroaromatic ring systems are two 5- or 6-membered heteroaromatic rings connected by ring condensation, or phenyl and one 5- or 6-membered heteroaromatic ring, or A ring system having a phenyl and a heterocycle, or a 5- or 6-membered heteroaromatic ring and a heterocycle; wherein the bicyclic heteroaromatic ring system has one, two or three ring atoms of N, It contains from 8 to 12 ring atoms independently selected from O and S.
[0018]
Bicyclic heteroaromatic ring systems are preferably indole, indoline, quinoline, tetrahydroquinoline, isoquinoine, tetrahydroisoquinoline, 1,4-benzodioxane, coumarin, dihydrocoumarin, benzofuran, 2,3-dihydrobenzofuran, 1,2 Selected from the group consisting of benzisoxazole, benzothiophene, benzoxazole, benzthiazole, benzimidazole, benzotriazole, pyrrolidine and quinolizidine.
[0019]
A heterocyclyl or heterocyclic moiety is a saturated or partially saturated ring system in which 1, 2 or 3 of the ring atoms have 3 to 7 ring atoms independently selected from N, O and S.
[0020]
The heterocyclyl moiety is preferably aziridine, oxirane, thiirane, azetidine, oxetane, thietane, pyrrolidine, pyrroline, imidazolidine, pyrazolidine, dioxolan, sulfolane, 2,3-dihydrofuranyl, 2,5-dihydrofuranyl, tetrahydrofuranyl , Thiophanyl, piperidine, piperazine, morpholine, 2,3-dihydropyranyl, tetrahydropyranyl, 1,4-dihydropyridinyl, 1,4-dioxanyl, 1,3-dioxanyl, dioxanyl, homopiperidinyl, homopiperazinyl, 1, It is selected from the group consisting of 3-dioxepane, 4,7-dihydro-1,3-dioxepin and hexamethylene oxide.
[0021]
The aromatic, heteroaromatic, heterocyclyl and bicyclic heteroaromatic moieties are unsubstituted or preferably halogen, trifluoromethyl, cyano, nitro, hydroxy, -NRFour Two-, -C (= O) ORFour, -C (= O) RFour, -C (= O) NRFour Two, -NRFourC (= O) RFour,-(C1-C6) Alkyl,-(CTwo-C6) Alkenyl, -ORFour, -SRFour, -SOTwoRFour, Oxo (= O), imino (= NRFour), Thio (= S) and oximino (= N-OR)Four) Is substituted on the ring carbon by a moiety independently selected from the group consisting of:
[0022]
The ring nitrogen atom of the 5-membered heteroaromatic, heterocyclyl or bicyclic heteroaromatic ring system is unsubstituted or chemically capable of substitution without quaternization of the ring nitrogen Is preferably-(C1-C6) Alkyl and -C (= O) RFourSubstituted with a moiety independently selected from the group consisting of:
[0023]
Substituent-(C1-C6) Alkyl,-(CTwo-C6) Alkenyl and-(C1-C6) The alkanoyl is unsubstituted or halogen, hydroxy, -ORFour, -NRFour TwoSubstituted on one or more carbons by a moiety independently selected from the group consisting of:
[0024]
Where the compounds of the present invention have one or more chiral centers, the compounds of the present invention may exist and be isolated as enantiomers or diastereomers, or as a racemic mixture. The present invention includes any possible enantiomer, diastereomer, racemate, or mixture thereof, of a compound of Formula I that acts as a CB2 agonist. The optically active forms may be synthesized by standard methods of organic chemistry well known in the art, for example, chiral chromatographic separation of racemates, synthesis from optically active starting materials, or asymmetric synthesis.
[0025]
Certain compounds of the present invention may exist as geometric isomers, such as E and Z isomers of the alkene. The present invention includes any geometric isomer of a compound of Formula I that acts as a CB2 agonist. The present invention is also intended to include tautomers of the compounds of formula I.
[0026]
Certain compounds of the present invention may exist in solvated forms, for example hydrated forms, as well as unsolvated forms. The present invention is meant to comprehend all such solvated forms of the compounds of Formula I that act as CB2 agonists.
[0027]
In a preferred embodiment of Formula I,1Is RFour TwoN (C1-C6) Alkyl, where both RFourIs (C1-C6) When it is alkyl,ThreeRepresents (as described above) the parts (a), (c), (d), (e), (f), (g), (h) and (k) and optionally (b) and (i) (where R6Is-(C1-C6) Alkyl (especially methyl, for example RThreeIs acetyl or acetamide) and (j) (RFiveAre both H, for example RThreeIs the primary amine).
[0028]
A preferred compound of the present invention is R1Is-(C1-C8) Alkyl,-(CTwo-C8) Alkenyl, aryl (C1-C6) Alkyl-, RFour TwoN (C1-C6) Alkyl-, RFourO (C1-C6) Alkyl-,-heterocycloalkyl (C1-C6) Alkyl- (4- to 8-membered) and heteroaryl (C1-C6) Selected from the group consisting of alkyl;
Where the aryl and heteroaryl R1Moiety is unsubstituted or-(C1-C6) Substituted with alkyl, acetoxymethyl or halogen;
RTwoIs -CHThree, -CHTwoCHThree, -CH (CHThree)Two, (CThree-CFive) Cycloalkyl and CFThreeSelected from the group consisting of:
[0029]
RThreeIs:
Embedded image
Figure 2004528334
Selected from the group consisting of:
[0030]
Ar is an aryl moiety; unsubstituted or (C1-C6) Alkyl, halogen, trifluoromethyl, cyano, nitro, hydroxy and -ORFourSubstituted with one or more moieties independently selected from the group consisting of:
X is -CHTwo-, -CHTwoCHTwo-, -C (= O)-, -S-, -O-, -C (R) (R ')-and -N (R)-, where R and R' = ( C1-C6) Alkyl, OR ″ or H, R ″ = H or (C1-C6) Is alkyl;
When Ar is phenyl or a 6 membered heteroaromatic ring system, X is -OR on ring Ar.TwoIn a 1,4 positional relationship with respect to the group;
When Ar is a 5-membered heteroaromatic ring system, X is -OR on ring Ar.TwoIn a 1,3 positional relationship with respect to the group;
RFourAre -H and-(C1-C6) Is independently selected from the group consisting of alkyl;
RFiveAre -H,-(C1-C6) Alkyl and-(CTwo-C6) Is independently selected from the group consisting of alkenyl;
R6Are -H,-(C1-C6) Alkyl and-(CTwo-C6) Is independently selected from the group consisting of alkenyl and heteroaryl;
Wherein the heteroaryl is unsubstituted or-(C1-C6) A compound of formula I substituted by alkyl.
[0031]
More preferred compounds of the present invention are represented by R1Is cyclopropylmethyl, ethyl, propyl, allyl, isopentyl, benzyl, methoxyethyl, dimethylaminoethyl, 4-pyridylmethyl, 2-pyridylmethyl, 1-pyrrolylethyl, 1-morpholinoethyl, cyclohexylmethyl, 2-pyrrolidylmethyl, N-methyl-2-pyrrolidylmethyl, 2-piperidylmethyl, N-methyl-2-piperidylmethyl, 3-thienylmethyl, 2-tetrahydrofuranylmethyl, (2-nitrothiophen-5-yl) methyl, (1- Methyl-1H-imidazol-2-yl) methyl, (5- (acetoxymethyl) -2-furanyl) methyl, (2,3-dihydro-1H-isoindol-1-yl) methyl and 5- (2-methylthiazolyl ) Is selected from the group consisting of:
RTwoIs -CHThree, -CHTwoCHThree, -CH (CHThree)TwoAnd CFThreeSelected from the group consisting of:
RFourIs-(C1-C6) Is alkyl;
RFiveIs -H, -CHThree, -CHTwoCHThree, -CH = CHTwoAnd -CHTwo-CH = CHTwoIndependently selected from the group consisting of:
R6Is -CHThree, -CHTwoCHThree, -CH = CHTwo, -CHTwo-CH = CHTwo, -CHTwo-CHTwo-CH = CHTwo, -CHTwoCH (CHThree)TwoAnd independently selected from the group consisting of 5-methyl-3-isoxazole;
Ar is phenyl or a 6-membered heteroaromatic ring system, either of which is unsubstituted or (C1-C6) Alkyl, halogen, trifluoromethyl, cyano, nitro, hydroxy and -ORFourSubstituted with one or more moieties independently selected from the group consisting of:
X is -CHTwo-, -CHTwoCHTwo-, -S-, -O-, -C (= O)-, -C (R) (R ')-and -N (R)-, where R and R' = ( C1-C6) Alkyl, OR ″ or H, R ″ = H or (C1-C6) Alkyl; and
X is -OR on the ring ArTwoThe compounds of formula I are in a 1,4 positional relationship with respect to the group.
[0032]
The most preferred compounds of the invention are represented by RTwoIs -CHTwoCHThreeAnd;
Ar is unsubstituted phenyl or pyridyl;
X is -CHTwo-, -CHTwoCHTwo-, -S-, -O-, -C (R) (R ')-and -N (R)-, where R and R' = (C1-C6) Alkyl, OR ″ or H, R ″ = H or (C1-C6) Alkyl; and
X is -OR on the ring ArTwoIn a 1,4 position with respect to the group; and
RFourIs a compound of formula I wherein is methyl.
[0033]
In certain preferred compounds, X is -CH (CHThree)-, -C (CHThree)Two-, -CH (OH)-, -NH- and -N (CHThree)-; Most preferably -CH (CHThree)-.
[0034]
We now show that the compounds of the invention show selective activity at the CB2 receptor site and indicate pain, especially chronic pain such as chronic inflammatory pain, neuropathic pain, back pain, cancer pain and Useful in relieving visceral pain. The compounds of the present invention may also be useful in treating acute pain. Furthermore, the compounds of the present invention are also useful in other disease states in which degeneration or dysfunction of the CB2 receptor is present or involved.
[0035]
The scope of the present invention also includes salts of the compounds of Formula I. In general, pharmaceutically acceptable salts of the compounds of this invention can be prepared by standard procedures well known in the art, for example, by converting a sufficiently basic compound, such as an alkylamine, to a suitable acid, such as hydrochloric acid or acetic acid. It may be obtained by reacting to form a physiologically acceptable anion. Also, compounds of the present invention having a suitable acidic proton, such as a carboxylic acid or phenol, can be converted to an alkali metal or alkaline earth metal hydroxide or alkoxide (eg, ethoxide or methoxide).
Alternatively, treatment with an equivalent amount of an appropriate basic organic amine (eg, choline or meglumine) in an aqueous solvent, followed by conventional purification procedures, gives the corresponding alkali metal (eg, sodium, potassium or lithium) or alkali. Earth metal (eg, calcium) salts can also be prepared.
[0036]
Furthermore, the use of the compounds of the present invention in therapy is encompassed by the present invention.
[0037]
The new compounds of the present invention are useful in therapy, especially in the treatment of various pain conditions, including but not limited to acute pain, chronic pain, neuropathic pain, acute pain, back pain, cancer pain and visceral pain .
[0038]
When used for treatment in a warm-blooded animal such as a human, the CB2 agonist will generally be administered in the form of a conventional pharmaceutical composition, and the composition will generally be in a form suitable for oral or sublingual administration, e.g. Tablets or capsules, or for parenteral injection (for example, intravenous, subcutaneous, intramuscular, intravascular or infusion), for example, sterile solutions, suspensions or emulsions, for topical administration, for example, ointments or creams, or for rectal administration Suppositories, for example. In general, the compositions described above may be prepared in a conventional manner using conventional carriers. The compositions of the present invention are conveniently provided in unit dosage form.
[0039]
Therapeutically effective amounts in practicing the present invention may be determined using known criteria, including the age, weight and response of the individual patient, and will be within the purview of those skilled in the art for the disease to be treated or prevented. May be interpreted.
[0040]
The use of any compound of formula I above for the manufacture of a medicament for the treatment of pain is encompassed by the present invention.
[0041]
Further provided is for the manufacture of a medicament for the treatment of various pain conditions, including but not limited to acute pain, chronic pain, neuropathic pain, acute pain, back pain, cancer pain and visceral pain. The use of any compound of formula I of the formula
[0042]
Another feature of the present invention is a method for the treatment of a subject suffering from any of the above-mentioned conditions, wherein an effective amount of the compound of formula I is administered to a patient in need of such treatment. Still further provided is a pharmaceutical composition comprising a compound of Formula I, or a pharmaceutically acceptable salt thereof, together with a pharmaceutically acceptable carrier.
[0043]
In particular, there is provided a pharmaceutical composition comprising a compound of formula I or a pharmaceutically acceptable salt thereof together with a pharmaceutically acceptable carrier, for treatment, in particular for the treatment of pain.
[0044]
Furthermore, there is provided a pharmaceutical composition comprising a compound of formula I or a pharmaceutically acceptable salt thereof together with a pharmaceutically acceptable carrier in any of the above-mentioned conditions. The term treatment, within the scope of the present invention, means administering an effective amount of a compound of the present invention to alleviate an existing disease state, dominant or chronic or recurrent symptom of the present invention. This definition also includes prophylactic treatment for the prevention of recurrent symptoms and continuous treatment of chronic disorders.
[0045]
(Pharmaceutical composition)
The new compounds of the present invention are administered orally, sublingually, intramuscularly, subcutaneously, topically, intranasally, intraperitoneally, intrapleurally, intravenously, epidural, intradurally, intraventricularly and intraarticularly. Good.
[0046]
Preferred routes of administration are oral, intravenous or intramuscular.
[0047]
The dose will depend on the route of administration, the severity of the disease, the age and weight of the patient, and other factors that the attending physician would normally consider in determining the individual use and dosage level as most appropriate for the particular patient. Change.
[0048]
For preparing pharmaceutical compositions from the compounds of the present invention, inert, pharmaceutically acceptable carriers can be either solid or liquid. Solid form preparations include powders, tablets, dispersible granules, capsules, cachets and suppositories.
[0049]
The solid carrier can be one or more substances that also function as diluents, flavoring agents, solubilizers, lubricants, suspending agents, binders or disintegrants; it is also an encapsulating agent. You can also.
[0050]
In powders, the carrier is a finely divided solid in a mixture with the finely divided active component.
In tablets, the active component is mixed with the carrier having the necessary binding properties in suitable proportions and compacted in the shape and size desired.
[0051]
For preparing suppositories, a low melting wax, such as a mixture of fatty acid glycerides or cocoa butter, is first melted and the active component is dispersed therein by, for example, stirring. The molten homogeneous mixture is then poured into convenient sized molds, allowed to cool, and to solidify.
[0052]
Suitable carriers are magnesium carbonate, magnesium stearate, talc, lactose, sugar, pectin, dextrin, starch, tragacanth, methylcellulose, sodium carboxymethylcellulose, a low melting wax, cocoa butter and the like.
[0053]
Salts are, for example, but not limited to, pharmaceutically acceptable salts. Examples of pharmaceutically acceptable salts included within the scope of the present invention are acetate, benzenesulfonate, benzoate, bicarbonate, bitartrate, carbonate, citrate, fumarate, glucone Acid salts, glutamate, hydrobromide, hydrochloride, lactate, maleate, mandelate, mesylate, phosphate / diphosphate, salicylate, succinate, sulfate, tartrate, And salts of choline, diethanolamine, ethylenediamine, meglumine, aluminum, calcium, magnesium, potassium, sodium, and zinc.
[0054]
Examples of pharmaceutically unacceptable salts within the scope of the present invention include hydroiodide, perchlorate, tetrafluoroborate, lithium salts.
[0055]
Preferred pharmaceutically acceptable salts are hydrochloride, sulfate and bitartrate.
[0056]
Hydrochlorides and sulfates are particularly preferred.
[0057]
The term composition embraces the preparation of the active compound using the encapsulating agent as a carrier which provides (with or without other carriers) the active ingredient in a capsule that is surrounded by the carrier with which it is combined. Similarly, cachets are included.
[0058]
Tablets, powders, cachets and capsules can be used as solid dosage forms suitable for oral administration.
[0059]
Liquid preparations include solutions, suspensions and emulsions. Sterile water or water-propylene glycol solutions of the active compounds are mentioned as liquid preparations suitable for parenteral administration. Liquid compositions can also be formulated as solutions in aqueous polyethylene glycol solution.
[0060]
Aqueous solutions suitable for oral administration can be prepared by dissolving the active component in water and adding suitable colorants, flavors, stabilizing, and thickening agents as desired. Aqueous suspensions suitable for oral use include finely divided active ingredients with viscous materials, such as natural or synthetic gums, resins, methylcellulose, sodium carboxymethylcellulose and other suspending agents well known in the pharmaceutical art. Can be produced by dispersing in water.
[0061]
Preferably, the pharmaceutical composition is in a unit dosage form. In such form, the composition is subdivided into unit doses containing appropriate quantities of the active component. The unit dosage form can be a packaged preparation, the package containing discrete quantities of preparation, such as packeted tablets, capsules, and powders in vials or ampoules. Furthermore, the unit dosage form can be a capsule, cachet, or tablet itself, or it can be the appropriate number of any of the above in packaged form.
[0062]
〔Production method〕
Method A1
Formula I below:
Embedded image
Figure 2004528334
Method A1 for the production of the compound of comprises the following steps: That is:
[0063]
Formula II below:
Embedded image
Figure 2004528334
[Where R1, RThreeAnd Y are defined as in formula I] with a compound of formula III:
[0064]
Embedded image
Figure 2004528334
[Where RTwo, Ar and X are defined as in Formula I, and L is -OH or a leaving group such as halide, O-tosyl or O-mesyl]. The reaction is conveniently carried out in an inert solvent such as toluene for 20 minutes at ambient temperature. Thereafter, a catalytic amount of concentrated hydrochloric acid is added and the mixture is heated at 85 ° C. for 12 hours. The work-up is carried out by means of aqueous extraction, and the purification of the product is carried out by means of normal or reverse phase chromatography.
[0065]
Method A2
Method A2 for the preparation of the compound of formula II comprises the following steps. That is:
Formula IV below:
Embedded image
Figure 2004528334
[Where R1, RThreeAnd Y are defined as in Formula I] can be reduced to the corresponding aniline (Formula II) by reacting with hydrogen at a pressure of 10 to 50 pounds per square inch. This reaction is conveniently carried out at ambient temperature in an inert solvent such as ethanol, methanol or tetrahydrofuran. The reaction is catalyzed by a transition metal catalyst, conveniently 5-10% palladium on finely divided carbon.
[0066]
Method A3
Method A3 for the preparation of the compound of formula IV involves the following steps. That is:
Formula V:
Embedded image
Figure 2004528334
[Where R1, RThreeAnd Y are defined as in formula I] with a primary amine. The reaction is conveniently carried out in a protic solvent such as 80% ethanol at a temperature of 50-100 ° C. The work-up is expediently carried out by means of aqueous extraction and the purification is expediently carried out by means of normal-phase chromatography.
[0067]
Method A4
Method A4 for the preparation of the compound of formula III comprises the following steps. That is:
Formula VI below:
Embedded image
Figure 2004528334
[Where RTwo, Ar and X are defined as in formula I, wherein L is -OH or a leaving group, for example a halide, O-tosyl or O-mesyl] with a halogenating agent such as thionyl chloride. Let react. This reaction is conveniently carried out at a temperature of 25-100 ° C in an inert solvent such as benzene or toluene. Work-up is expediently carried out by removing the solvent under reduced pressure and purification is expediently carried out by distillation.
[0068]
Method A5
Method A5 for the preparation of the compound of formula VIII comprises the following steps. That is:
The following formula VII (prepared according to step A1):
Embedded image
Figure 2004528334
[Where R1, RTwo, Ar, X and Y are defined as in formula I and are prepared by the general method described above]. The reaction is conveniently carried out at reflux temperature in an aqueous solvent mixture such as 1: 1 ethanol / water. After neutralization, the product is conveniently isolated by filtering the cooled reaction mixture.
[0069]
Method A6
Alternatively, method A6 for the preparation of the compound of formula VIII comprises the following steps. That is:
The following formula X (prepared by step A1):
Embedded image
Figure 2004528334
[Where R1, RTwo, Ar, X and Y are as defined for formula I and are prepared by the general method described above]. The compound of formula I is hydrolyzed with an aqueous base such as sodium hydroxide to give the corresponding carboxylic acid. Conversion to the corresponding carboxylic acid VIII by conversion to an acid.
[0070]
Method A7
Method A7 for the preparation of the compound of formula IX involves the following steps. That is:
Formula VIII below:
Embedded image
Figure 2004528334
[Where R1, RTwo, Ar, X and Y are as defined for formula I and are prepared by the general method described above] with HATU [O- (7-azabenzotriazol-1-yl) -N, N, N ', N'-tetramethyluronium hexafluorophosphate], HBTU [O-benzotriazol-1-yl) -N, N, N', N'-tetramethyluronium hexafluorophosphate] or TBTU [O- ( 1H-benzotriazol-1-yl) -N, N, N ', N'-pentamethylene-uronium tetrafluoroborate] with a primary or secondary amine in the presence of an acid activator. Convert to the corresponding amide. The reaction is conveniently carried out at ambient temperature in a polar aprotic solvent such as DMF with a tertiary amine such as triethylamine or diisopropylethylamine functioning as an acid scavenger. The product is conveniently isolated by aqueous extraction and purified by normal phase chromatography.
[0071]
Method A8
Method A8 for the preparation of the compound of formula XI comprises the following steps. That is:
The following formula IX (prepared by step A1 or A7):
Embedded image
Figure 2004528334
[Where R1, RTwo, R6, Ar, X and Y are as defined for formula I and are prepared by the general methods described above.TwoSFiveTo give the corresponding thioamide (Formula XI). The reaction is conveniently carried out in pyridine at a temperature of 100 ° C. The product is conveniently isolated by aqueous decant extraction of the reaction mixture and purified by normal phase chromatography.
[0072]
Method A9
Method A9 for the preparation of the compound of formula XII involves the following steps. That is:
The following formula VII (prepared according to step A1):
Embedded image
Figure 2004528334
[Where R1, RTwo, Ar, X and Y are as defined for formula I and are prepared by the general method described above] in a 50% aqueous formic acid solution using a catalytic amount of Raney nickel. The reaction is conveniently carried out at 90 ° C. in an aqueous acidic solvent mixture such as a 50% aqueous formic acid solution. The product is conveniently isolated by filtering the cooled reaction mixture through a pad of diatomaceous earth, concentrating and purifying by normal phase chromatography.
[0073]
Method A10
Method A10 for the preparation of the compound of formula XIII comprises the following steps. That is:
Formula XII below:
Embedded image
Figure 2004528334
[Where R1, RTwo, RFive, Ar, X and Y are as defined for formula I and are prepared by the general method described above]. The compound of formula I is reacted with a primary or secondary amine in the presence of a suitable reducing agent such as sodium triacetoxyborohydride. Reductive amination using The reaction is conveniently carried out in tetrahydrofuran at ambient temperature with 1-1.5 equivalents of acetic acid and 1-1.5 equivalents of sodium triacetoxyborohydride. The product is conveniently isolated by decomposing the borate ester intermediate with 1N hydrochloric acid followed by aqueous extraction. The organic extract is concentrated to a crude product and purified by normal phase chromatography.
[0074]
Method A11
Method A11 for the preparation of compounds of formula XIV involves the following steps. That is:
Formula XII below:
Embedded image
Figure 2004528334
[Where R1, RTwo, R6, Ar, X, and Y are defined as in Formula I and are prepared by the general method described above] with an organometallic reagent such as a Grignard reagent, followed by oxidation of the intermediate alcohol. To ketone. The Grignard reaction is conveniently carried out at 0 ° C. in tetrahydrofuran using 6 equivalents of an organomagnesium halide such as methylmagnesium bromide. The product is conveniently isolated by decomposing the excess organometallic reagent by adding water, then extracting with water and concentrating the organic extract. Oxidation of this intermediate alcohol was carried out in the presence of 4 ° molecular sieves in a catalytic amount (about 5 mol%) of tetrapropylammonium perthenate (TPAP) and N-methylmorpholine-N-oxide (NMO) 1-1. It is carried out by reaction with 5 equivalents. The reaction is conveniently carried out at ambient temperature in dichloromethane. The product is conveniently isolated by concentrating the reaction mixture and purifying by normal phase chromatography.
[0075]
Method A12
Method A12 for the preparation of the compound of formula XVI involves the following steps. That is:
The following formula XV (prepared according to step A1):
Embedded image
Figure 2004528334
[Where R1, RTwo, R6, Ar, X and Y are as defined for formula I and are prepared by the general method described above]. The compound is hydrolyzed with a base such as potassium hydroxide in an aqueous solvent such as a 50% aqueous ethanol solution. It is converted to the corresponding aniline by decomposition. The reaction is conveniently performed at reflux temperature for an extended period of time (8-16 hours). The product is conveniently isolated by cooling the reaction mixture to ambient temperature, acidifying the mixture with 1N hydrochloric acid and filtering off the precipitated product.
[0076]
Method A13
Method A13 for the preparation of the compound of formula XVII involves the following steps. That is:
The following formula XVI:
Embedded image
Figure 2004528334
[Where R1, RTwo, Ar, X and Y are defined as in formula I and are prepared by the general method described above] by reacting the compound with hydrochloric acid and sodium nitrite in aqueous acetic acid to form the intermediate diazonium salt. Convert to the corresponding sulfonyl chloride. The reaction is conveniently carried out below -10C. This intermediate diazonium salt is rapidly converted to the sulfonyl chloride by dropwise addition to a freshly prepared saturated solution of sulfur dioxide in acetic acid in the presence of copper (I) chloride. The reaction is conveniently carried out at -10C to -5C. The product is conveniently isolated by pouring the reaction mixture into ice-water, extracting with dichloromethane and concentrating under vacuum. The sulfonyl chloride of formula XVII is typically used without further purification.
[0077]
Method A14
Method A14 for the preparation of the compound of formula XVIII involves the following steps. That is:
Formula XVII below:
Embedded image
Figure 2004528334
[Where R1, RTwo, R6, Ar, X and Y are as defined for formula I and are prepared by the general methods described above]. The compound is converted to the corresponding sulfonamide by reaction with a primary or secondary amine. The reaction is conveniently performed in a non-polar solvent such as dichloromethane at ambient temperature in the presence of an acid scavenger such as pyridine. The product is conveniently isolated by aqueous extraction and purified by normal phase chromatography.
[0078]
Method A15
Method A15 for the preparation of the compound of formula XX involves the following steps. That is:
Formula XIX below:
Embedded image
Figure 2004528334
[Where RTwo, RThree, Ar, X and Y are as defined for formula I and are prepared according to method A1 above] using a palladium (0) -mediated deallylation reaction in the presence of a cationic scavenger such as phenylsilane. Convert to a compound of Formula XX. The product is conveniently isolated by aqueous extraction and purified by normal phase chromatography.
[0079]
Method A16
Method A16 for the preparation of the compound of Formula XX involves the following steps. That is:
The following formula XXI:
Embedded image
Figure 2004528334
[Where RTwo, RThree, Ar, X and Y are as defined for formula I and are prepared by method A2 described above] under palladium-catalyzed reduction conditions to a compound of formula XX. The product is conveniently isolated by filtration and purified by normal phase chromatography or used directly without chromatographic purification.
[0080]
Method A17
Method A17 for the preparation of compounds of formula I involves the following steps. That is:
The following formula XX:
Embedded image
Figure 2004528334
[Where R1, RTwo, RThree, Ar, X and Y are defined as in formula I], in a one-pot manner, followed by conversion to the corresponding compound of formula I by borane reduction. The reaction is conveniently carried out at ambient temperature or higher in a mixed solvent such as 1,2-dichloroethane and acetic acid. The product is conveniently isolated by aqueous extraction and purified by normal or reverse phase chromatography.
[0081]
Method A18
Yet another feature of the invention is a palladium catalyst such as Pd / C, optionally under pressure (eg, 1 to 10 atm, preferably 1 to 5 atm, more preferably 2 to 4 atm) in the presence of hydrogen Treating the solution of the compound in a solvent, preferably a non-polar solvent such as ethyl acetate, with the amino-substituted nitro moiety ortho to the amino substituent on the phenyl or pyridyl ring of the compound. A method for selective reduction in the presence of a nitro moiety para to the group. In certain embodiments, both nitro substituents are para to the nitrogen of the pyridine ring. For a typical protocol, reference is made to Example 5B described below.
[0082]
Yet another feature of the present invention is a compound of formulas VIII, X and XIII:
Embedded image
Figure 2004528334
And its use in the synthesis of compounds of formula I.
[0083]
The compounds of the present invention may be synthesized according to the procedures shown in Schemes 1 to 15 below.
[0084]
Embedded image
Figure 2004528334
[0085]
Embedded image
Figure 2004528334
[0086]
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[0090]
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[0099]
〔Example〕
The present invention is illustrated in more detail by the following examples, which describe how to make, purify, analyze and biologically test the compounds of the present invention, but the invention is not limited thereto.
[0100]
Example 1 Biological Evaluation
hCB1 and hCB2 receptor binding
Human CB1 (obtained from Receptor Biology) or CB2 (obtained from BioSignal) membranes are thawed at 37 ° C., passed through a 25 gauge blunt-ended needle three times, and cannabinoid binding buffer (5 mM Tris, 2.5 mM EDTA, 5 mM MgCl 2).TwoAnd 0.5 mg / ml without BSA fatty acid, pH 7.4) and aliquots into 96-well plates containing the appropriate amount of protein. IC of compounds at hCB1 and hCB250Values are between 20000 and 25000 dpm per well in a final volume of 300 μL.ThreeIt is evaluated from a 10-point dose response curve obtained using H-CP55,940 (0.17-0.21 nM). Total binding and non-specific binding are measured in the absence or presence of 0.20 μM HU210, respectively. Plates are vortexed, incubated for 60 minutes at room temperature, and washed with wash buffer (50 mM Tris, 5 mM MgCl 2).Two, 0.5 mg BSA, pH 7.0) and filtered through Unifilters GF / B (pre-soaked in 0.1% polyethyleneimine) equipped with a Tomec or Packard harvester. Dry the filter at 55 ° C. for 1 hour. After adding 65 μl / well of MS-20 scintillation fluid, the radioactivity (cpm) is counted in TopCount (Packard).
[0101]
hCB1 and hCB2 GTPγS binding
Human CB1 (obtained from Receptor Biology) or CB2 (obtained from BioSignal) membranes were thawed at 37 ° C., passed through a 25 gauge blunt-ended needle three times, and GTPγS binding buffer (5 mM Hepes, 20 mM NaOH, 100 mM NaCl, 0.1 mM NaCl) was added. 1 mM EDTA, 5 mM MgClTwo, PH 7.4, 0.1% BSA). The EC50 and Emax of the compounds are estimated from 10 point dose response curves obtained in 300 μl containing the appropriate amount of protein and GTPg35S / well (0.11 to 0.14 nM) of 100,000 to 130,000 dpm. Baseline and maximal stimulation binding is measured in the absence or presence of 1 μM (CB2) or 10 μM (CB1) of Win55,212-2, respectively. The membrane is pre-incubated for 5 minutes with 56.25 μM (CB2) or 112.5 μM (CB1) GDP before dispensing into plates (15 μM (CB2) or 30 μM (CB1) final GDP). Plates are vortexed, incubated for 60 minutes at room temperature, and washed with wash buffer (50 mM Tris, 5 mM MgCl 2).Two, 50 mM NaCl, pH 7.0) with Unifilters GF / B (pre-soaked in water) equipped with a Tomec or Packard harvester. Dry the filter at 55 ° C. for 1 hour. After adding 65 μl / well of MS-20 scintillation fluid, the radioactivity (cpm) is counted in TopCount (Packard). Antagonist regression tests are performed except that (a) the dose response curve of the agonist is determined in the presence of a fixed concentration of the antagonist, or (b) the dose response curve of the antagonist is determined in the presence of the fixed concentration of the agonist. In a similar manner. The biological data for the selected compounds are shown in Table 1 below.
[0102]
[Table 1]
Figure 2004528334
[0103]
Example 2:
2- (4-methoxybenzyl) -N, N-diethyl-1- [2- (4-morpholinyl) ethyl] -1H-benzimidazole-5-carboxamide
2A: N, N-diethyl-4-fluoro-3-nitrobenzamide:
CHTwoClTwoA stirred solution of 4-fluoro-3-nitrobenzoic acid (25.0 g, 135 mmol) and thionyl chloride (40.0 ml, 548 mmol) in (40 ml) was refluxed until the starting material was consumed. The solvent was co-evaporated with toluene (2 × 20 ml) under vacuum. The acyl chloride thus obtained is converted to CH 2TwoClTwo(60 ml), cooled to 0 ° C., and then added with vigorous stirring diisopropylethylamine (DIPEA) (28.2 ml, 162 mmol) and diethylamine (14.0 ml, 135 mmol). After 2 hours at room temperature, the solvent was evaporated under vacuum and the resulting oil was removed with Et.TwoO (200 ml), 5% NaOH (3 × 100 ml), 5% KHSOFour(100 ml) and brine (100 ml). Organic layer MgSOFourDry over, filter and evaporate under vacuum. The crude oil was dissolved in EtOAc (10 ml) and after overnight at −20 ° C., the light orange solid was filtered and washed with cold EtOAc (5 ml) and hexane (10 ml) to give the title compound (19.6 g) Got. The filtrate was evaporated and likewise crystallized from EtOAc (2 ml) to give a further 6.7 g (80.5%) of the title compound as a light orange solid.
1H NMR (CDClThree): δ 8.11 (dd, J = 7.6Hz, J = 1.8Hz, 1H), 7.71-7.67 (m, 1H), 7.36 (dd, J = 10.8Hz, J = 8.4Hz, 1H), 3.56 (br s , 2H), 3.28 (br s, 2H), 1.22 (br s, 6H).
[0104]
2B: N, N-diethyl-4-{[2- (4-morpholinyl) ethyl] amino} -3-nitrobenzamide
N, N-diethyl-4-fluoro-3-nitrobenzamide (1.00 g, 4.16 mmol), 2- (4-morpholinyl) ethanamine (0.600 ml, 4.58) in 80% aqueous EtOH (05 ml). (Mmol) was heated under reflux for 4 hours. Then the reaction mixture was concentrated under vacuum and the residue was dissolved in EtOAc (40 ml). Organic layer is saturated NaHCOThree(2 × 10 ml) and the combined aqueous layers were further extracted with EtOAc (2 × 20 ml). MgSO 4 combined organic layerFourDry over, filter and concentrate under vacuum to give the title compound. The crude product was purified by silica gel column chromatography (100% EtOAc to 5% triethylamine / EtOAc) to give the title compound (1.12 g, 77%) as a light yellow solid.
1H-NMR (CDClThree): δ 8.67 (s, 1H), 8.28 (d, J = 1.2 Hz, 1H), 7.56 (dd, J = 8.8 Hz, J = 1.6 Hz, 1H), 6.85 (d, J = 8.8 Hz, 1H), 3.77 (t, J = 5.2 Hz, 4H), 3.55-3.20 (br m, 6H), 2.74 (t, J = 6.4 Hz, 2H), 2.53 (br s, 4H), 1.22 (t, J = 6.8 Hz, 6H). MS (ESI) (M + H)+= 351.
[0105]
2C: 3-amino-N, N-diethyl-4-{[2- (4-morpholinyl) ethyl] amino} benzamide
A mixture of N, N-diethyl-4-{[2- (4-morpholinyl) ethyl] amino} -3-nitrobenzamide (1.10 g, 3.14 mmol) and 19% Pd / C in MeOH (50 ml) was prepared. Hydrogenated at 40 psi for 2 hours. After completion of the reaction, the reaction mixture was filtered with diatomaceous earth. The title compound (0.958 g, 95%) obtained by removing the solvent was used without further purification. MS (ESI) (M + H+) = 321.
[0106]
2D: 2- (4-methoxybenzyl) -N, N-diethyl-1- [2- (4-morpholinyl) ethyl] -1H-benzimidazole-5-carboxamide
(4-Methoxyphenyl) acetyl chloride (0.063 g, 0.343 mmol) was added to 3-amino-N, N-diethyl-4-{[2- (4-morpholinyl) ethyl] amino} in acetic acid (2 ml). Benzamide (0.100 g, 0.312 mmol) was added and the mixture was stirred overnight at 95 ° C. Then the reaction mixture was concentrated under vacuum and the residue was dissolved in EtOAc (15 ml). The organic layer was washed with 1N NaOH (2 × 8 ml) and the combined aqueous layers were further extracted with ethyl acetate (2 × 15 ml). MgSO 4 combined organic layerFourDry over, filter and concentrate under vacuum. The crude product was purified by reverse phase high performance liquid chromatography (HPLC) to give the title compound as a trifluoroacetic acid (TFA) salt (0.132 g, 53%).
1H NMR (DMSO-d6): δ 7.74 (d, J = 8.0 Hz, 1H), 7.57 (s, 1H), 7.34 (d, J = 8.0 Hz, 1H), 7.25 (d, J = 8.0 Hz, 2H), 6.91 (d, J = 8.0 Hz, 2H), 4.64 (t, J = 7. (6 Hz, 2H), 4.36 (s, 2H) 3.76 (br s, 2H), 3.71 (s, 3H), 3.35 (br s , 4H), 3.20 (br s, 6H), 1.07 (br s, 6H) MS (ESI) (M + H)+= 451.
Analytical value (C26H34NFourOThree+3.0 TFA +0.6 HTwoO):
Calculated: C, 47.84; H, 4.79; N, 6.97.
Found: C, 47.83; H, 4.83; N, 6.96.
[0107]
Example 3
2- (4-ethoxybenzyl) -N, N-diethyl-1- (2-methoxyethyl) -1H-benzimidazole-5-carboxamide
3A: N, N-diethyl-4-[(2-methoxyethyl) amino] -3-nitrobenzamide
According to general procedure 2B, N, N-diethyl-4-fluoro-3-nitrobenzamide (0.200 g, 0.833 mmol), 2-methoxyethanamine (0.065 ml) in 80% aqueous EtOH (5 ml). , 0.757 mmol) was heated to 90 ° C. overnight. After work-up, the crude product was purified by silica gel column chromatography (33% EtOAc / hexane to 50% EtOAc / hexane) to give the title compound (0.191 g, 85%) as a light yellow solid.
1H NMR (CDClThree): δ 8.34 (s, 1H), 8.28 (d, J = 2.8 Hz, 1H), 7.56 (dd, J = 8.4 Hz, J = 1.6 Hz, 1H), 6.91 (d, J = 9.2 Hz, 1H), 3.69 (t, J = 5.6 Hz, 2H), 3.53 (q, J = 5.6 Hz, 2H), 3.44 (s overlapping br s, 7H), 1.22 (t, J = 6.4 Hz, 6H). MS (ESI) (M + H)+= 296.
[0108]
3B: 3-amino-N, N-diethyl-4-[(2-methoxyethyl) amino]
Following general procedure 2C, N, N-diethyl-4-[(2-methoxyethyl) amino] -3-nitrobenzamide (0.150 g, 0.508 mmol) and 10% Pd / C in EtOAc (15 ml). Was hydrogenated at 40 psi overnight. The title compound (0.159 g) obtained by usual work-up was used without further purification.
1H-NMR (CDClThree): δ 6.86 (dd, J = 8.4 Hz, J = 2.0 Hz, 1H), 6.80 (d, J = 1.6 Hz, 1H), 6.60 (d, J = 8.0 Hz, 1H), 3.66 (t, J = 5.6 Hz, 2H), 3.41 (s overlapping br s, 7H), 3.31 (t, J = 5.6 Hz, 2H), 1.18 (t, J = 7.6 Hz, 6H). MS (ESI) (M + H)+= 266.
[0109]
3C: (4-ethoxyphenyl) acetyl chloride
To a stirred solution of (4-ethoxyphenyl) acetic acid (10.0 g, 55.5 mmol) in benzene (100 ml) was added thionyl chloride (50 ml, 68.5 mmol) and the reaction mixture was heated at 80 ° C. for 2 hours. Stirred. The solvent was evaporated under vacuum and the crude was purified by distillation (bp 86 ° C., 0.4 Torr) to give the title compound (10.39 g, 94%) as a yellow oil. MS of methyl ester: MS (ESI) (M + H)+= 194
[0110]
3D: 2- (4-ethoxybenzyl) -N, N-diethyl-1- (2-methoxyethyl) -1H-benzimidazole-5-carboxamide
According to general procedure 2D, (4-ethoxyphenyl) acetyl chloride (0.107 g, 0.539 mmol) was added to 3-amino-N, N-diethyl-4-[(2- Methoxyethyl) amino] benzamide (0.130 g, 0.490 mmol). After 20 minutes, 1 drop of concentrated HCl was added and the mixture was heated to 85 ° C. for 12 hours. After usual workup, the crude product was purified by reverse phase HPLC to give the title compound as a TFA salt (0.120 g, 36%) as an oil.
1H NMR (DMSO-d6): δ 7.86 (d, J = 9.2 Hz, 1H), 7.63 (s, 1), 7.43 (d, J = 8.4 Hz, 1H), 7.25 (d, J = 8.4 Hz, 2H), 6.90 (d, J = 9.2 Hz, 2H), 4.60 (t, J = 4.8 Hz, 2H), 4.47 (s, 2H), 3.97 (q, J = 7.6 Hz, 2H), 3.57 (m, 2H), 3.40 (br s , 2H), 3.20 (br s, 2H), 3.15 (s, 3H), 1.28 (t, J = 7.6 Hz, 3H), 1.07 (br s, 6H). MS (ESI) (M + H)+= 411.
Analytical value (Ctwenty fourH31NThreeOThree+ 2.2 TFA + 0.6 HTwoO):
Calculated: C, 50.82; H, 5.17; N, 6.26.
Found: C, 50.85; H, 5.30; N, 6.06.
[0111]
Example 4:
1- [2- (acetylamino) ethyl] -2- (4-ethoxybenzyl) -N, N-diethyl-1H-benzimidazole-5-carboxamide
4A: 4-{[2- (acetylamino) ethyl] amino} -N, N-diethyl-3-nitrobenzamide
According to general procedure 2B, N, N-diethyl-4-fluoro-3-nitrobenzamide (0.200 g, 0.833 mmol), 2- (2-aminoethyl) acetamide in 80% aqueous EtOH (5 ml). (0.077 g, 0.757 mmol) was heated to 90 ° C. overnight. After work-up, the crude product was purified by silica gel column chromatography (100% EtOAc to 5% MeOH / EtOAc) to give the title compound (0.152 g, 63%) as a light yellow solid.
1H NMR (CDClThree): δ 8.27 (d overlapping br s, J = 2.0 Hz, 2H), 7.55 (dd, 7 = 8.4 Hz, J = 2.0 Hz, 1H), 6.99 (d, J = 9.2 Hz, 1H), 6.06 (br s, 1H), 3.58-3.50 (m, 4H), 3.44 (br s, 4H), 2.02 (s, 3H), 1.22 (t, J = 7.2 Hz, 6H). MS (ESI) (M + H)+= 323.
[0112]
4B: 4-{[2- (acetylamino) ethyl] amino} -3-amino-N, N-diethylbenzamide
Following general procedure 2C, 4-{[2- (acetylamino) ethyl] amino} -N, N-diethyl-3-nitrobenzamide (0.150 g, 0.465 mmol) and 10% Pd / C in EtOAc. (15 ml) was hydrogenated at 40 psi overnight. The title compound (0.164 g, 100%) obtained by usual work-up was used without further purification.
1H-NMR (CDClThree): δ6.83 (dd, J = 8.0 Hz, J = 2.0 Hz, 1H), 6.76 (d, J = 2.0 Hz, 1H), 6.53 (d, J = 8.4 Hz, 1H), 6.26 (br t, 1H), 3.53 (q, J = 5.6 Hz, 2H), 3.43 (br s, 4H), 3.23 (t, J = 5.6 Hz, 2H), 1.99 (s, 3H), 1.17 (t, J = 6.4 Hz, 6H). MS (ESI) (M + H)+= 293.
[0113]
4C: 1- [2- (acetylamino) ethyl] -2- (4-ethoxybenzyl) -N, N-diethyl-1H-benzimidazole-5-carboxamide
According to General Procedure 2D, (4-ethoxyphenyl) acetyl chloride (0.097 g, 0.490 mmol) was added to 4-{[2- (acetylamino) ethyl] amino} -3 in toluene (2.5 ml). -Amino-N, N-diethylbenzamide (0.130 g, 0.445 mmol). After 20 minutes, 1 drop of concentrated HCl was added and the mixture was heated to 85 ° C. for 12 hours. After usual workup, the crude product was purified by reverse phase HPLC to give the title compound as a TFA salt (0.042 g, 14%) as a brown solid.
NMR (DMSO-d6): δ8.01 (t, J = 5.6 Hz, 1H), 7.81 (d, J = 8.4 Hz, 1H), 7.63 (s, 1), 7.45 (d, J = 8.4 Hz, 1H), 7.26 (d , J = 8.4 Hz, 2H), 6.90 (d, J = 8.4 Hz, 2H), 4.43 (m, 4H), 3.97 (q, J = 7.2 Hz, 2H), 3.40 (br s, 2H), 3.38 ( t, J = 4.8 Hz, 2H), 3.20 (br s, 2H), 3.15 (s, 3H), 1.61 (s, 3H), 1.28 (t, J = 7.2 Hz, 3H), 1.06 (br s, 6H ). MS (ESI) (M + H)+= 437.
Analytical value (Ctwenty fiveH32NFourOThree+ 2.1 TFA + 0.8 HTwoO):
Calculated: C, 50.80; H, 5.21; N, 8.11.
Found: C, 50.87; H, 5.87; N, 8.09.
[0114]
Example 5:
Methyl 3- [5-[(diethylamino) carbonyl] -2- (4-ethoxybenzyl) -1H-benzimidazol-1-yl] propanoate
5A: Ethyl 3- {4-[(diethylamino) carbonyl] -2-nitroanilino} propanoate
According to general procedure 2B, N, N-diethyl-4-fluoro-3-nitrobenzamide (0.200 g, 0.833 mmol), ethyl 3-aminopropanoate (0%) in 80% aqueous EtOH (5 ml). .116 g, 0.757 mmol) was heated to 90 ° C. overnight. After work-up, the crude product was purified by silica gel column chromatography (50% EtOAc / hexane to 100% EtOAc) to give the title compound (0.162 g, 63%).
1H NMR (CDClThree): δ8.34 (br t, J = 5.6 Hz, 1H), 8.29 (d, J = 2.0 Hz, 1H), 7.58 (dd, J = 8.4 Hz, J = 2.0 Hz, 1H), 6.92 (d, J = 9.2 Hz, 1H), 4.21 (q, J = 7.2 Hz, 2H), 3.69 (q, J = 6.4 Hz, 2H), 3.44 (br s, 4H), 2.72 (t, J = 6.4 Hz, 2H ), 1.30 (t, J = 6.4 Hz, 3H), 1.22 (t, J = 6.8 Hz, 6H). MS (ESI) (M + H)+= 338.
[0115]
5B: Ethyl 3- {2-amino-4-[(diethylamino) carbonyl] anilino} propanoate
According to general procedure 2C, a mixture of ethyl 3- {4-[(diethylamino) carbonyl] -2-nitroanilino} propanoate (0.150 g, 0.455 mmol) and 10% Pd / C in EtOAc (15 ml) at 40 psi. And hydrogenated overnight. The title compound (0.158 g) obtained by usual work-up was used without further purification.
1H-NMR (CDClThree): δ6.86 (dd, J = 8.4 Hz, J = 2.0 Hz, 1H), 6.80 (d, J = 2.0 Hz, 1H), 6.62 (d, J = 8.4 Hz, 1H), 4.18 (q, J = 7.2 Hz, 2H), 3.46 (t and overlapping br s, J = 5.6 Hz, 6H), 2.66 (t, J = 6.8 Hz, 2H), 1.28 (t, J = 7.2 Hz, 3H), 1.18 ( t, J = 6.8 Hz, 6H). MS (ESI) (M + H)+= 308.
[0116]
5C: Methyl 3- [5-[(diethylamino) carbonyl] -2- (4-ethoxybenzyl) -1H-benzimidazol-1-yl] propanoate
Following general procedure 2D, (4-ethoxyphenyl) acetyl chloride (0.092 g, 0.465 mmol) was added to ethyl 3- {2-amino-4-[(diethylamino) carbonyl] in toluene (2.5 ml). Added to anilino dipropanoate (0.130 g, 0.423 mmol). After 20 minutes, 1 drop of concentrated HCl was added and the mixture was heated to 85 ° C. for 12 hours. After usual work-up, the crude product was purified by reverse phase HPLC (with transesterification with MeOH) to give the title compound as a TFA salt (0.084 g, 30%) as an oil.
1H NMR (DMSO-d6): δ7.88 (d, J = 9.2 Hz, 1H), 7.62 (s, 1H), 7.41 (d, J = 8.4 Hz, 1H), 7.25 (d, J = 8.0 Hz, 2H), 6.90 (d , J = 8.4 Hz, 2H), 4.59 (t, J = 6.4 Hz, 2H), 4.49 (s, 2H), 3.97 (q, J = 6.4 Hz, 2H), 3.55 (s, 3H), 3.40 (br s, 2H), 3.16 (br s, 2H), 2.77 (t, J = 6.4 Hz, 2H), 1.28 (t, J = 7.6 Hz, 3H), 1.07 (br s, 6H). MS (ESI) (M + H)+= 438.
Analytical value (Ctwenty fiveH31NThreeOFour+ 1.8 TFA + 0.8 HTwoO):
Calculated: C, 52.27; H, 5.28; N, 6.39.
Found: C, 52.31; H, 5.22; N, 6.37.
[0117]
Example 6:
1- (2-aminoethyl) -2- (4-ethoxybenzyl) -N, N-diethyl-1H-benzimidazole-5-carboxamide
6A: t-butyl 2- {4-[(diethylamino) carbonyl] -2-nitroanilino} ethylcarbamate
According to general procedure 2B, N, N-diethyl-4-fluoro-3-nitrobenzamide (0.200 g, 0.833 mmol), t-butyl 2-aminoethylcarbamate (80% in 80% aqueous EtOH). (0.121 g, 0.757 mmol) was heated to 85 ° C. overnight. After work-up, the crude product was purified by recrystallization from EtOAc to give the title compound (0.165 g, 57%) as a light yellow solid.
1H-NMR (CDClThree): δ8.31 (br s, 1H), 8.29 (d, J = 1.6 Hz, 1H), 7.57 (dd, J = 9.6 Hz, J = 2.0 Hz, 1H), 6.97 (d, J = 9.6 Hz, 1H), 4.83 (br s, 1H), 3.55-3.40 (m, 8H), 1.47 (s, 9H), 1.22 (t, J = 7.6 Hz, 6H). MS (ESI) (M + H)+= 381.
[0118]
6B: t-butyl 2- {2-amino-4-[(diethylamino) carbonyl] anilino} ethyl carbamate
Following general procedure 2C, t-butyl 2- {4-[(diethylamino) carbonyl] -2-nitroanilino} ethylcarbamate (0.155 g, 0.407 mmol) and 10% Pd / C in EtOAc (15 ml). The mixture was hydrogenated at 40 psi overnight. The title compound (0.164 g) obtained by usual work-up was used without further purification.
1H-NMR (CDClThree): δ6.85 (dd, J = 8.4 Hz, J = 1.6 Hz, 1H), 6.80 (d, J = 2.0 Hz, 1H), 6.57 (d, J = 7.6 Hz, 1H), 4.87 (br s, 1H), 3.48-3.38 (br s, 6H), 3.27 (t, J = 5.6 Hz, 2H), 1.46 (s, 9H), 1.18 (t, J = 6.8 Hz, 6H). MS (ESI) (M + H)+351.
[0119]
6C: 1- (2-aminoethyl) -2- (4-ethoxybenzyl) -N, N-diethyl-1H-benzimidazole-5-carboxamide
Following general procedure 2D, (4-ethoxyphenyl) acetyl chloride (0.082 g, 0.424 mmol) was added to t-butyl 2- {2-amino-4-[(diethylamino) in toluene (2.5 ml). Carbonyl] anilinodiethyl carbamate (0.135 g, 0.385 mmol). After 20 minutes, 1 drop of concentrated HCl was added and the mixture was heated to 85 ° C. for 12 hours. After usual work-up, the crude product was purified by reverse phase HPLC to give the title compound as a TFA salt (0.123 g, 44%) as a white solid.
1H NMR (CDThreeOD): δ7.91 (d, J = 8.4 Hz, 1H), 7.73 (s, 1H), 7.57 (dd, J = 8.4 Hz, J = 2.0 Hz, 2H), 7.30 (d, J = 8.4 Hz, 2H), 6.97 (d, J = 8.4 Hz, 2H), 4.75 (t, J = 6.8 Hz, 2H), 4.55 (s, 2H), 4.03 (q, J = 6.8 Hz, 2H), 3.58 (br s , 2H), 3.36 (t, J = 6.4 Hz, 2H), 3.29 (br s, 2H), 1.37 (t, J = 6.4 Hz, 3H), 1.27 (br s, 3H), 1.12 (br s, 3H ). MS (ESI) (M + H)+= 395.
Analytical value (Ctwenty threeH30NFourOTwo+ 2.8 TFA + 0.8 HTwoO):
Calculated: C, 47.17; H, 4.76; N, 7.69.
Found: C, 47.16; H, 4.80; N, 7.52.
[0120]
Example 7:
1- {2- [acetyl (methyl) amino] ethyl} -2- (4-ethoxybenzyl) -N, N-diethyl-1H-benzimidazole-5-carboxamide
CHTwoClTwoProduct 6C, 1- (2-aminoethyl) -2- (4-ethoxybenzyl) -N, N-diethyl-1H-benzimidazole-5-carboxamide (0.085 g, 0.177 mmol) in (3 ml) ), Triethylamine (0.070 ml, 0.50 mmol) was added with acetyl chloride (0.015 g, 0.200 mmol) and the resulting mixture was stirred for 15 minutes at room temperature. The mixture is saturated NaHCOThreeWash with aqueous solution and brine, and wash the organic layer with MgSOFourDry over, filter and concentrate under vacuum.
[0121]
The above crude product was dissolved in dimethylformamide (DMF) (2 ml), NaH (60% dispersion in oil, 0.005 g, 0.217 mmol) was added and the mixture was stirred for 20 minutes at room temperature. The solvent was removed under vacuum and the residue was dissolved in EtOAc. Organic layer is saturated NaHCOThreeWashed with aqueous solution, brine, MgSOFourDry over, filter and concentrate under vacuum. The crude product was purified by reverse phase HPLC to give the title compound as a TFA salt (0.017 g, 26%) as a white solid.
1H-NMR (CDThreeOD): δ7.97 (d, J = 8.4Hz, 1H), 7.69 (s, 1H), 7.59 (d, J = 7.2Hz, 1H), 7.33 (d, J = 8.4Hz, 2H), 6.96 ( d, J = 8.4Hz, 2H), 4.66 (t, J = 6.0Hz, 2H), 4.60 (s, 2H), 4.02 (q, J = 7.1Hz, 2H), 3.72 (t, J = 6.0Hz, 2H), 3.56 (br, 2H), 3.28 (br, 4H), 3.06 (s, 3H), 1.79 (s, 3H), 1.36 (t, J = 8.6Hz, 3H), 1.25 (br, 3H), 1.10 (br, 3H). MS (ESI) (M + H)+= 451.
[0122]
Example 8:
2- (4-ethoxybenzyl) -N, N-diethyl-1-methyl-1H-benzimidazole-5-carboxamide
8A: N, N-diethyl-4- (methylamino) -3-nitrobenzamide
According to general procedure 2B, N, N-diethyl-4-fluoro-3-nitrobenzamide (0.125 g, 0.521 mmol), HCl methylamine (0.035 g, 0.35 g) in 80% aqueous EtOH (3 ml). .521 mmol) was heated to 85 ° C. for 4 hours. The title compound obtained by usual work-up (0.130 g, 100%) was used without further purification. MS (ESI) (M + H)+= 252
[0123]
8B: 3-amino-N, N-diethyl-4- (methylamino) benzamide
According to general procedure 2C, a mixture of N, N-diethyl-4- (methylamino) -2-nitrobenzamide (0.130 g, 0.517 mmol) and 10% Pd / C in EtOAc (10 ml) at 40 psi. Hydrogenated. The title compound (0.124 g) obtained by usual work-up was used without further purification. MS (ESI) (M + H)+= 222
[0124]
8C: 2- (4-ethoxybenzyl) -N, N-diethyl-1-methyl-1H-benzimidazole-5-carboxamide
According to General Procedure 2D, (4-ethoxyphenyl) acetyl chloride (0.119 g, 0.596 mmol) was prepared by adding 3-amino-N, N-diethyl-4- (methylamino) benzamide (2 ml) in acetic acid (2 ml). 0.120 g, 0.542 mmol) and the mixture was stirred at 90 ° C. overnight. After work-up, the crude product was purified by reverse phase HPLC to give the title compound as a TFA salt (0.087 g, 26%) as a red oil.
1H NMR (DMSO-d6): δ7.90 (d, J = 8.4 Hz, 1H), 7.70 (s, 1H), 7.49 (d, J = 8.4 Hz, 1H), 7.29 (d, J = 8.4 Hz, 2H), 6.92 (d , J = 8.4 Hz, 2H), 4.50 (s, 2H), 3.98 (q, J = 7.6 Hz, 2H), 3.93 (s, 3H), 3.42 (br s, 2H), 3.14 (br s, 2H) , 1.28 (t, J = 6.8 Hz, 3H), 1.11 (br s, 3H), 1.04 (br s, 3H). MS (ESI) (M + H)+= 366.
Analytical value (Ctwenty twoH27NThreeOTwo+ 2.1 TFA + 0.2 HTwoO):
Calculated: C, 51.71; H, 4.89; N, 6.91.
Found: C, 51.73; H, 4.82; N, 6.93.
[0125]
Example 9:
2- (4-ethoxybenzyl) -N, N-diethyl-1- (2-phenylethyl) -1H-benzimidazole-5-carboxamide
9A: N, N-diethyl-3-nitro-4-[(2-phenylethyl) amino] benzamide
According to general procedure 2B, N, N-diethyl-4-fluoro-3-nitrobenzamide (0.125 g, 0.521 mmol), 2-phenylethanamine (0.065 g) in 80% aqueous EtOH (3 ml). , 0.521 mmol) was heated to 85 ° C. for 4 hours. The title compound obtained by usual work-up (0.170 g, 96%) was used without further purification. MS (ESI) (M + H)+= 342
[0126]
9B: 3-amino-N, N-diethyl-4-[(2-phenylethyl) amino] benzamide
N, N-Diethyl-3-nitro-4-[(2-phenylethyl) amino] benzamide (0.170 g, 0.498 mmol) and 10% Pd / C in EtOAc (10 ml) according to general procedure 2C. Was hydrogenated at 40 psi. The title compound (0.156 g) obtained by usual work-up was used without further purification. MS (ESI) (M + H)+= 312
[0127]
9C: 2- (4-ethoxybenzyl) -N, N-diethyl-1- (2-phenylethyl) -1H-benzimidazole-5-carboxamide
According to general procedure 2E, (4-ethoxyphenyl) acetyl chloride (0.105 g, 0.530 mmol) was added to 3-amino-N, N-diethyl-4-[(2-phenylethyl) in acetic acid (2 ml). ) Amino] benzamide (0.150 g, 0.482 mmol) and the mixture was stirred overnight at 90 ° C. After work-up, the crude product was purified by reverse phase HPLC to give the title compound as a TFA salt (0.100 g, 36%) as a purple solid.
1H NMR (DMSO-d6): δ7.74 (d, J = 8.4 Hz, 1H), 7.62 (s, 1H), 7.34 (d, J = 7.2 Hz, 1H), 7.24-7.19 (m, 5H), 7.10 (d, J = 8.4 Hz, 2H), 6.91 (d, J = 8.4 Hz, 2H), 4.56 (t, J = 7.2 Hz, 2H), 4.23 (s, 2H), 3.97 (q, J = 6.8 Hz, 2H), 3.40 (br s, 2H), 3.19 (br s, 2H), 2.86 (t, J = 7.2 Hz, 2H), 1.28 (t, J = 6.8 Hz, 3H), 1.08 (br s, 6H). MS (ESI) (M + H)+= 456.
Analytical value (C29H33NThreeOTwo+1.0 TFA +0.2 HTwoO):
Calculated: C, 64.96; H, 6.05; N, 7.33.
Found: C, 65.05; H, 6.09; N, 7.29.
[0128]
Example 10:
2- (4-ethoxybenzyl) -N, N-diethyl-1- [2- (1-piperidinyl) ethyl] -1H-benzimidazole-5-carboxamide
10A: N, N-diethyl-3-nitro-4-{[2- (1-piperidinyl) ethyl] amino} benzamide
According to general procedure 2B, N, N-diethyl-4-fluoro-3-nitrobenzamide (1.0 g, 4.2 mmol), 2- (1-piperidinyl) ethanamine (80%) in 80% aqueous EtOH (30 ml). 0.564 ml, 3.96 mmol) was heated to 85 ° C. for 10 hours. After usual work-up, the crude product was dissolved in 1N HCl (40 ml) and CHTwoClTwo(2 × 10 ml). The aqueous layer was basified with 5N NaOH (10 ml) and CHTwoClTwo(3 × 10 ml). The combined organic layers areTwoSOFourDry over, filter and concentrate under vacuum and use the title compound (0.800 g, 57%) obtained as a light yellow solid without further purification.
1H NMR (CDClThree): δ8.64 (br s, 1H), 8.25 (d, J = 2.4 Hz, 1H), 7.53 (d, J = 8.8 Hz, 1H), 6.82 (d, J = 8.8 Hz, 1H), 3.41 ( br s, 4H), 3.35 (br s, 2H), 2.64 (br s, 2H), 2.53 (br s, 4H), 1.61 (br s, 4H), 1.44 (br s, 2H), 1.19 (t, J = 7.0 Hz, 6H).
[0129]
10B: 3-amino-N, N-diethyl-4-{[2- (1-piperidinyl) ethyl] amino} benzamide
Following general procedure 2C, N, N-diethyl-3-nitro-4-{[2- (1-piperidinyl) ethyl] amino} benzamide (0.800 g, 2.30 mmol) and 10% Pd / EtOAc in EtOAc. A mixture of C (30 ml) was hydrogenated at 30 psi for 24 hours. The title compound (0.724 g) obtained by usual work-up was used without further purification.
[0130]
10C: 2- (4-ethoxybenzyl) -N, N-diethyl-1- [2- (1-piperidinyl) ethyl] -1H-benzimidazole-5-carboxamide
According to General Procedure 2D, 1M (4-ethoxyphenyl) acetyl chloride in toluene (0.095 g, 0.095 mmol) was prepared by adding 3-amino-N, N-diethyl-4-methyl-4-toluene in toluene (1.0 ml). {[2- (1-Piperidinyl) ethyl] amino} benzamide (0.027 g, 0.856 mmol). After 20 minutes, one drop of concentrated HCl was added and the mixture was heated to 85 ° C. overnight. After work-up, the crude product was purified by reverse phase HPLC to give the title compound as a TFA salt (0.026 g, 39%).
1H NMR (CDThreeOD): δ 7.89 (d, J = 8.0 Hz, 1H), 7.70 (s, 1H), 7.52 (d, J = 8.4 Hz, 1H), 7.27 (d, J = 7.6 Hz, 2H), 6.96 (d , J = 7.2 Hz, 2H), 4.52 (s, 2H), 4.02 (q, J = 7.6 Hz, 2H), 3.56 (br s, 4H), 3.34 (t, J = 7.6 Hz, 2H), 3.28 ( br s, 4H), 3.00 (br s, 2H), 1.88 (br s, 4H), 1.53 (br s, 2H), 1.36 (t, J = 6.4 Hz, 3H), 1.25 (br s, 3H), 1.11 (br s, 3H). MS (ESI) (M + H)+= 463.
Analytical value (C28H38NFourOTwo+ 2.6 TFA + 0.5 HTwoO):
Calculated: C, 51.92; H, 5.46; N, 7.29.
Found: C, 51.94; H, 5.43; N, 7.25.
[0131]
Example 11:
1- [2- (dimethylamino) -1-methylethyl] -2- (4-ethoxybenzyl) -N, N-diethyl-1H-benzimidazole-5-carboxamide
11A: 4-{[2- (dimethylamino) -1-methylethyl] amino} -N, N-diethyl-3-nitrobenzamide
N, N-diethyl-4-fluoro-3-nitrobenzamide (0.500 g, 2.08 mmol), N1, N1A mixture of -dimethyl-1,2-propanediamine (0.636 g, 6.24 mmol), DIPEA (2.2 ml, 12.5 mmol) and DMF (12 ml) was stirred at room temperature for 4 hours. The reaction mixture was then concentrated in vacuo and the residue was dissolved in 2N NaOH (30 ml) and CHTwoClTwo(3 × 40 ml). The combined organic layers were washed with brine (10ml) and dried over MgSOFourDry over, filter and concentrate under vacuum. The crude reaction mixture is subjected to silica gel column chromatography (100% CHTwoClTwo55% MeOH / CHTwoClTwo) To give the title compound (0.621 g, 93%) as a light yellow solid.
1H NMR (CDClThree): δ8.33 (d, J = 6.4 Hz, 1H), 8.27 (d, J = 2.0 Hz, 1H), 7.55 (dd, J = 8.8 Hz, J = 2.0 Hz, 1H), 6.91 (d, J = 9.6 Hz, 1H), 3.79 (heptet, J = 7.2 Hz, 1H), 3.45 (br d, J = 5.2 Hz, 4H), 2.55 (dd, J = 12.0 Hz, J = 7.6 Hz, 1H), 2.39 (dd, J = 12.4 Hz, J = 5.8 Hz, 1H), 2.29 (s, 6H), 1.69 (br s, 1H), 1.31 (d, J = 6.8 Hz, 2H), 1.22 (t, J = 7.4 Hz, 6H). MS (ESI) (M + H)+= 323.
[0132]
11B: 3-amino-4-{[2- (dimethylamino) -1-methylethyl] amino} -N, N-diethylbenzamide
Following general procedure 2C, 4-{[2- (dimethylamino) -1-methylethyl] amino} -N, N-diethyl-3-nitrobenzamide (0.516 g, 1.60 mmol) and 10 in EtOAc. A mixture of% Pd / C (20 ml) was hydrogenated at 35 psi overnight. The title compound (0.408 g, 87%) obtained by usual work-up was used without further purification.
1H-NMR (CDClThree): δ6.82 (dd, J = 8.0 Hz, J = 2.0 Hz, lH), 6.77 (d, J = 2.4 Hz, 1H), 6.62 (d, J = 8.0 Hz, 1H), 3.52-336 (m , 6H), 2.52 (dd, J = 12.0 Hz, J = 9.6 Hz, 2H), 2.28-2.19 (m, 7H), 1.17 (m, 8H). MS (ESI) (M + H)+= 293.
[0133]
11C: 1- [2- (dimethylamino) -1-methylethyl] -2- (4-ethoxybenzyl) -N, N-diethyl-1H-benzimidazole-5-carboxamide
According to general procedure 2D, 1M (4-ethoxyphenyl) acetyl chloride in toluene (0.095 g, 0.095 mmol) was added to 3-amino-4-{[2- (dimethyl) in toluene (1.0 ml). Amino) -1-methylethyl] amino} -N, N-diethylbenzamide (0.025 g, 0.0856 mmol). After 20 minutes, one drop of concentrated HCl was added and the mixture was heated to 85 ° C. overnight. After work-up, the crude product was purified by reverse phase HPLC to give the title compound as a TFA salt (0.024 g, 38%).
1H NMR (CDThreeOD): δ7.96 (d, J = 8.4 Hz, 1H), 7.72 (s, 1H), 7.47 (d, J = 7.6 Hz, 2H), 7.24 (m, 2H), 6.94 (m, 2H), 5.20 (br s, 1H), 4.50 (s, 2H), 4.03-3.95 (m, 3H), 3.77 (dd, J = 14.0 Hz, J = 5.6 Hz, 1H), 3.56 (br s, 2H), 3.28 (m, 2H), 2.81 (s, 6H), 1.56 (d, J = 6.8 Hz, 3H), 1.35 (t, J = 6.4 Hz, 3H), 1.25 (br s, 3H), 1.14 (br s, 3H). MS (ESI) (M + H)+= 437.
Analytical value (C26H36NFourOTwo+ 2.5 TFA + 0.7 HTwoO):
Calculated: C, 50.71; H, 5.48; N, 7.63.
Found: C, 50.76; H, 5.46; N, 7.61.
[0134]
Example 12:
1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -N, N-diethyl-1H-benzimidazole-5-carboxamide
12A: 4-[(cyclopropylmethyl) amino] -N, N-diethyl-3-nitrobenzamide
According to general procedure 2B, N, N-diethyl-4-fluoro-3-nitrobenzamide (0.823 g, 3.42 mmol) and cyclopropylmethanamine (0.39 ml, 80% aqueous ethanol (17 ml)) (4.50 mmol) was stirred at 85 ° C. for 16 hours. The crude product (1.00 g), which was an orange solid, was used in the next step.
1H-NMR (CDThreeOD): δ8.23 (d, J = 2.0 Hz, 1H), 7.55 (dd, J = 9.2 Hz, J = 2.0 Hz, 1H), 7.09 (d, J = 9.2 Hz, 1H), 3.47 (br s , 3H), 3.31 (q, J = 2.0 Hz, 2H), 3.27 (d, J = 6.4 Hz, 2H), 1.23 (overlapping t and m, J = 7.0 Hz, 7H), 0.68-0.60 (m, 2H), 0.40-0.34 (m, 2H). MS (ESI) (M + H)+= 292.
[0135]
12B: 3-amino-4-[(cyclopropylmethyl) amino] -N, N-diethylbenzamide
According to General Procedure 2C, 4-[(cyclopropylmethyl) amino] -N, N-diethyl-3-nitrobenzamide (1.00 g) was hydrogenated for 24 hours to afford the title compound as a greenish brown solid ( 0.889 g). The crude product was used for the next step.
1H NMR (CDThreeOD): δ 6.72-6.78 (m, 2H), 6.58 (d, J = 8.4 Hz, 1H), 3.43 (br s, 4H), 2.99 (d, J = 6.4 Hz, 2H), 1.18 (overlapping br t and m, J = 6.4 Hz, 7H), 0.59-0.52 (m, 2H), 0.30-0.24 (m, 2H). MS (ESI) (M + H)+= 262.
[0136]
12C: 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -N, N-diethyl-1H-benzimidazole-5-carboxamide
According to general procedure 2D, (4-ethoxyphenyl) acetyl chloride (0.1109 g, 0.547 mmol) was converted to 3-amino-4-[(cyclopropylmethyl) amino] -N, N in acetic acid (2 ml). -Diethylbenzamide (0.130 g, 0.497 mmol) was added and the mixture was stirred overnight at 90 ° C. After work-up, the crude product was purified by reverse phase HPLC to give the title compound as a TFA salt (0.042 g, 14%) as an oil.
1H NMR (DMSO-d6): δ 7.59 (d, J = 8.4 Hz, 1H), 7.30 (s, 1H), 7.08 (d, J = 7.2 Hz, 1H), 6.91 (d, J = 9.2 Hz, 2H), 6.53 (d, J = 8.4 Hz, 2H), 4.14 (s, 2H), 3.97 (d, J = 7.2 Hz, 2H), 3.60 (q, J = 6.4 Hz, 2H), 3.04 (br s, 2H), 2.80 (br s, 2H), 0.90 (t, J = 6.4 Hz, 3H), 0.78 (br m, 7H), 0.10-0.03 (m, 4H). MS (ESI) (M + H)+= 406.
Analytical value (Ctwenty fiveH31NThreeOTwo+ 1.9 TFA):
Calculated: C, 55.60; H, 5.33; N, 6.75.
Found: C, 55.51; H, 5.25; N, 6.74.
[0137]
Example 13:
1- (cyclopropylmethyl) -2-[(6-ethoxy-3-pyridinyl) methyl] -N, N-diethyl-1H-benzimidazole-5-carboxamide
15A: (6-ethoxy-3-pyridinyl) acetic acid
To a stirred solution of (6-chloro-3-pyridinyl) acetic acid (0.094 g, 0.545 mmol) in EtOH (1.6 mL), 3.1 m EtONa in EtOH (0.7 mL, 2.17 mmol). Was added and the reaction mixture was stirred at 100 ° C. and after 24 h at room temperature, excess NaH (60% dispersion in oil) was added with 1 ml of EtOH and heating at 100 ° C. was continued for 96 h. The solvent was removed under vacuum and the residue was dissolved in diethyl ether (5ml). The organic layer was washed with dilute HCl (2 × 2 ml) and brine (2 ml),FourDry over, filter and concentrate under vacuum and use the title compound (0.081 g, 82%) obtained as a light brown solid without further purification.
1H NMR (CDClThree): δ10.06 (br s, 1H), 8.06 (s, 1H), 7.55 (d, J = 9.2Hz, 1H), 6.72 (d, J = 8.4Hz, 1H), 4.30 (q, J = 6.1 Hz, 2H), 3.58 (s, 2H), 1.38 (t, J = 8.0, 3H). MS (ESI) (M + H)+= 182.
[0138]
13B: 1- (cyclopropylmethyl) -2-[(6-ethoxy-3-pyridinyl) methyl] -N, N-diethyl-1H-benzimidazole-5-carboxamide
To a stirred solution of (6-ethoxy-3-pyridinyl) acetic acid (0081 g, 0.448 mmol)) in DMF (2 ml) was added O- (7-azabenzotriazol-1-yl) -N, N, N '. , N'-tetramethyluronium hexafluorophosphate (HATU) (0.178 g, 0.486 mmol) and DIPEA (0.156 ml, 0.895 mmol) were added and the reaction mixture was stirred for 10 minutes at room temperature. . 3-Amino-4-[(cyclopropylmethyl) amino] -N, N-diethylbenzamide (0.111 g, 0.448 mmol) was added and the resulting mixture was stirred at room temperature for 1 hour. The mixture was diluted with EtOAc (15 ml) and saturated NaHCOThree(8 ml) and then with brine (8 ml),FourDry over and concentrate under vacuum and use the resulting crude amide without further purification.
[0139]
The above crude intermediate was dissolved in acetic acid (5 ml) and the mixture was heated to 90 ° C. overnight. The reaction mixture was concentrated and the residue was dissolved in EtOAc (15ml). The organic layer was washed with 1N NaOH (2 × 8 ml) and then with brine (8 ml),FourDry over and concentrate under vacuum. The crude product was purified by silica gel column chromatography (2% MeOH / EtOAc) to give the title compound (0.111 g, 65%) as a light brown solid.
1H NMR (CDClThree): δ8.05 (s, 1H), 7.75 (s, 1H), 7.49 (d, J = 8.4 Hz, 1H), 7.38-7.30 (m, 2H), 6.68 (d, J = 8.4 Hz, 1H) , 4.32 (qd, J = 7.2 Hz, J = 2.2 Hz, 2H), 4.25 (s, 2H), 3.55 (br s, 2H), 3.38 (br s, 2H), 1.38 (td, J = 6.8 Hz, J = 2.0 Hz, 3H), 1.22 (brs, 6H), 1.12-1.03 (m, 1H), 0.60-0.54 (m, 2H), 0.33-0.28 (m, 2H). MS (ESI) (M + H)+= 407.
Analytical value (Ctwenty fourHtwenty fiveNFourOTwo+ 0.2 HTwoO):
Calculated: C, 70.63; H, 7.01; N, 13.73.
Found: C, 70.83; H, 7.50; N, 13.67.
[0140]
Example 14:
1- [2- (dimethylamino) ethyl] -2- [2- (4-ethoxyphenyl) ethyl] -N, N-diethyl-1H-benzimidazole-5-carboxamide
14A: 4-{[2- (dimethylamino) ethyl] amino} -N, N-diethyl-3-nitrobenzamide
N, N-diethyl-4-fluoro-3-nitrobenzamide (0.534 g, 2.22 mmol) and N1, N1-Dimethyl-1,2-ethanediamine (0.22 ml, 2.02 mmol) was stirred for 14 hours at 85 ° C. Dissolve the crude product in 1N HCl and add Et.TwoPurified by plating with O (2 × 15 ml). The aqueous layer was adjusted to pH 11 with 5N NaOH, then CHTwoClTwo(4 × 15 ml). CH combinedTwoClTwoLayer MgSOFourDry over, filter and concentrate under vacuum to give the title compound (0.560 g, 82%) as an orange oil.
1H-NMR (CDThreeOD): δ8.22 (d, J = 2.8 Hz, 1H), 7.56 (dd, J = 8.4 Hz, J = 2.8 Hz, 1H), 7.09 (d, J = 8.4 Hz, 1H), 3.53-3.40 ( Overlapping t, J = 6.4 Hz, and br s, 6H), 2.67 (t, J = 6.4 Hz, 2H), 2.33 (s, 6H), 1.22 (t, J = 7.6 Hz, 6H). MS (ESI) (M + H)+= 309.
[0141]
14B: 3-amino-4-{[2- (dimethylamino) ethyl] amino} -N, N-diethylbenzamide
According to General Procedure 2C, 4-{[2- (dimethylamino) ethyl] amino} -N, N-diethyl-3-nitrobenzamide (0.560 g, 1.82 mmol) was hydrogenated for 3 hours to give a greenish To give the title compound (0.531 g) as a brown solid. The crude product was used for the next step.
1H NMR (CDThreeOD): δ6.77, 6.76 (overlapping s and dd, J = 6.4 Hz, J = 2.0 Hz, 2H), 6.61 (d, J = 8.4 Hz, 1H), 3.45 (br s, 4H), 3.29 ( t, J = 6.4 Hz, 2H), 2.66 (t, J = 6.4 Hz, 2H), 2.34 (s, 6H), 1.19 (br t, J = 6.8 Hz, 6H). MS (ESI) (M + H)+= 279.
[0142]
14C: 1- [2- (dimethylamino) ethyl] -2- [2- (4-ethoxyphenyl) ethyl] -N, N-diethyl-1H-benzimidazole-5-carboxamide
According to general procedure 13B, 3- (4-ethoxyphenyl) propanoic acid (0.0386 g, 0.198 mmol), HATU (0.0756 g, 0.199 mmol), DIPEA (0.047 ml, 0.27 mmol) ) And 4-{[2- (dimethylamino) ethyl] amino} -N, N-diethyl-3-aminobenzure (0.0503 g, 0.180 mmol). The crude product was purified by column chromatography (9: 1 CH).TwoClTwo: MeOH) to give the title compound (0.0284 g, 36%).
1H-NMR (CDThreeOD): δ7.64 (s, 1H), 7.53 (d, J = 8.4 Hz, 1H), 7.29 (d, J = 8.4 Hz, 1H), 7.06 (d, J = 8.4 Hz, 2H), 6.78 ( d, J = 8.4 Hz, 2H), 4.14 (t, J = 8.0 Hz, 2H), 3.96 (q, J = 7.2 Hz, 2H), 3.57 (br s, 2H), 3.35 (br s, 2H), 3.21-3.10 (m, 4H), 2.43 (t, J = 7.6 Hz, 2H), 2.26 (s, 6H), 1.34 (t, J = 7.2 Hz, 3H), 1.26, 1.16 (2 overlapping br s, 6H).
13C-NMR (CDThreeOD):? . MS (ESI) (M + H)+= 437.
HCl salt is EtTwoPrepared using HCl in O. After lyophilization, a white solid was obtained.
Analytical value (C26H36NFourOTwo・ 2.8 HCl ・ 2.2 HTwoO):
Calculated: C, 54.00; H, 7.53; N, 9.69.
Found: C, 54.12; H, 7.53; N, 9.36.
[0143]
Example 15:
1- (cyclopropylmethyl) -2- [2- (4-ethoxyphenyl) ethyl] -N, N-diethyl-1H-benzimidazole-5-carboxamide
According to general procedure 13B, 3- (4-ethoxyphenyl) propanoic acid (0.0409 g, 0.211 mmol), HATU (0.0801 g, 0.211 mmol), DIPEA (0.050 ml, 0.29 mmol) ) And 3-amino-4-[(cyclopropylmethyl) amino] -N, N-diethylbenzamide (0.0500 g, 0.191 mmol) were mixed. The crude product was purified by column chromatography (19: 1 CH).TwoClTwo: MeOH) to give the title compound (0.0457 g, 57%).
1H NMR (CDThreeOD): δ 7.64 (s, 1H), 7.55 (d, J = 8.4 Hz, 1H), 7.27 (d, J = 8.4 Hz, 1H), 7.08 (d, J = 8.4 Hz, 2H), 6.77 (d , J = 8.4 Hz, 2H), 3.97 (d, J = 7.2 Hz, 2H), 3.95 (q, J = 6.8 Hz, 2H), 3.57 (br s, 2H), 3.34 (br s, 2H), 3.23 -3.07 (m, 4H), 1.34 (t, J = 6.4 Hz, 3H), 1.36-1.02 (overlapping 2 × br s and m, 7H), 0.55-0.46 (m, 2H), 0.40-0.32 (m , 2H).
13C-NMR (CDThreeOD):? . MS (ESI) (M + H)+= 420.
HCl salt is EtTwoPrepared using HCl in O. A white solid was obtained after lyophilization.
Analytical value (C26H33NThreeOTwo・ 1.0 HCl ・ 0.8 HTwoO):
Calculated: C, 66.38; H, 7.63; N, 8.93.
Found: C, 66.35; H, 7.60; N, 8.81.
[0144]
Example 16:
2- (4-ethoxybenzyl) -N, N-diethyl-1-isopentyl-1H-benzimidazole-5-carboxamide
16A: N, N-diethyl-4- (isopentylamino) -3-nitrobenzamide
Following general procedure 2B, N, N-diethyl-4-fluoro-3-nitrobenzamide (1.077 g, 4.48 mmol) and 3-methyl-1-butanamine (0.68 ml, 5.83 mmol) were added. Stir at 85 ° C. for 14 hours to give the title compound (1.425 g) as an orange oil. The crude product was used for the next step.
1H-NMR (CDThreeOD): δ8.22 (d, J = 2.0 Hz, 1H), 7.56 (dd, J = 9.2 Hz, J = 2.0 Hz, 1H), 7.09 (d, J = 9.2 Hz, 1H), 3.52-3.40 ( br m, 6H), 1.83-1.72 (m, 1H), 1.64 (q, J = 7.6 Hz, 2H), 1.23 (t, J = 7.6 Hz, 6H), 1.01 (d, J = 6.8 Hz, 6H) . MS (ESI) (M + H)+= 308.
[0145]
16B: 3-amino-N, N-diethyl-4- (isopentylamino) benzamide
According to General Procedure 2C, N, N-diethyl-4- (isopentylamino) -3-nitrobenzamide (1.425 g, 4.64 mmol) was hydrogenated for 4 hours and the title compound (1. 312 g) was obtained. The crude product was used for the next step.
1H-NMR (CDThreeOD): δ6.78-6.74 (m, 2H), 6.58 (d, J = 8.4 Hz, 1H), 3.45 (br s, 4H), 3.17 (t, J = 7.6 Hz, 2H), 1.83-1.72 ( m, 1H), 1.59 (q, J = 7.2 Hz, 2H), 1.19 (t, J = 6.4 Hz, 6H), 0.98 (d, J = 6.4 Hz, 6H). MS (ESI) (M + H)+= 278.
[0146]
16C: 2- (4-ethoxybenzyl) -N, N-diethyl-1-isopentyl-1H-benzimidazole-5-carboxamide
According to general procedure 13B, (4-ethoxyphenyl) acetic acid (0.110 g, 0.612 mmol), HATU (0.233 g, 0.611 mmol), DIPEA (0.15 ml, 0.86 mmol) and 3 -Amino-N, N-diethyl-4- (isopentylamino) benzamide (0.154 g, 0.556 mmol) was mixed. The crude product was purified by column chromatography (19: 1 CH).TwoClTwo: MeOH) to give the title compound (0.211 g, 90%).
1H NMR (CDThreeOD): δ7.67 (s, 1H), 7.50 (d, J = 8.4 Hz, 1H), 7.30 (dd, J = 8.4 Hz, J = 2.0 Hz, 1H), 7.16 (d, J = 9.2 Hz, 2H), 6.86 (d, J = 8.4 Hz, 2H), 4.28 (s, 2H), 4.12 (m, 2H), 3.98 (q, J = 7.6 Hz, 2H), 3.57 (br s, 2H), 3.34 (br s, 2H), 1.62-1.48 (m, 1H), 1.34 (t, J = 7.6 Hz, 3H), 1.36-1.07 (overlapping 2 × br s and m, 8H), 0.88 (d, J = 6.8 Hz, 6H). MS (ESI) (M + H)+= 422.
Analytical value (C26H35NThreeOTwo・ 1.7 TFA ・ 0.2 HTwoO):
Calculated: C, 57.05; H, 6.04; N, 6.79.
Found: C, 57.11; H, 6.09; N, 6.69.
[0147]
Example 17:
2- (4-ethoxybenzyl) -N, N-diethyl-1- (4-pyridinylmethyl) -1H-benzimidazole-5-carboxamide
17A: N, N-diethyl-3-nitro-4-[(4-pyridinylmethyl) amino] benzamide
Following general procedure 2B, N, N-diethyl-4-fluoro-3-nitrobenzamide (0.272 g, 1.13 mmol) and 4-pyridinylmethanamine (0.11 ml, 1.12 mmol) were added. Stirred at room temperature for 87 hours. The crude product was purified by column chromatography (100% EtOAc, then 9: 1 CHTwoClTwo/ MeOH) to give the title compound (0.181 g, 60%).
1H NMR (CDThreeOD): δ8.49 (d, J = 6.4 Hz, 2H), 8.27 (d, J = 2.8 Hz, 1H), 7.50-7.42 (m, 3H), 6.87 (d, J = 8.4 Hz, 1H), 4.77 (s, 2H), 3.44 (br s, 4H), 1.21 (t, J = 7.2 Hz, 6H). MS (ESI) (M + H)+= 329.
[0148]
17B: 3-amino-N, N-diethyl-4-[(4-pyridinylmethyl) amino] benzamide
Following general procedure 2C, hydrogenate N, N-diethyl-3-nitro-4-[(4-pyridinylmethyl) amino] benzamide (0.181 g, 0.551 mmol) for 20 hours to give a viscous brown oil. To give the title compound (0.172 g). The crude product was used for the next step.
1H NMR (CDThreeOD): δ8.45 (d, J = 6.8 Hz, 2H), 7.46 (d, J = 6.4 Hz, 2H), 6.79 (d, J = 2.0 Hz, 1H), 6.64 (dd, J = 7.2 Hz, J = 2.0 Hz, 1H), 6.36 (d, J = 8.4 Hz, lH), 4.51 (s, 2H), 3.42 (br s, 4H), 1.17 (br t, 6H). MS (ESI) (M + H)+= 299.
[0149]
17C: 2- (4-ethoxybenzyl) -N, N-diethyl-1- (4-pyridinylmethyl) -1H-benzimidazole-5-carboxamide
According to general procedure 13B, (4-ethoxyphenyl) acetic acid (0.0364 g, 0.202 mmol), HATU (0.0768 g, 0.202 mmol), DIPEA (0.048 ml, 0.28 mmol) and 3 -Amino-N, N-diethyl-4-[(4-pyridinylmethyl) amino] benzamide (0.0548 g, 0.184 mmol) was mixed. The crude product was subjected to reverse phase MPLC (10-50% CH in gradient water).ThreeCN) to give the title compound (0.0449 g, 36%) as a TFA salt. This material was lyophilized from water / dioxane to give a white solid.
1H-NMR (CDThreeOD): δ 8.60 (br s, 2H), 7.87 (s, 1H), 7.70 (d, J = 8.4 Hz, 1H), 7.52 (dd, J = 8.4 Hz, J = 2.0 Hz, 1H), 7.42 (d, J = 5.6 Hz, 2H), 7.13 (d, J = 8.4 Hz, 2H), 6.71 (d, J = 9.6 Hz, 2H), 6.06 (s, 2H), 4.54 (s, 2H), 3.93 (q, J = 7.2 Hz, 2H), 3.59 (brs, 2H), 3.31 (brs, 2H), 1.35 (t, J = 6.8 Hz, 3H), 1.38-1.04 (2 × brs, 6H). MS (ESI) (M + H)+= 443.
Analytical value (C27H30NFourOTwo・ 2.1 TFA ・ 0.8 HTwoO):
Calculated: C, 53.81; H, 4.88; N, 8.04.
Found: C, 53.74; H, 4.89; N, 8.07.
[0150]
Example 18:
2- (4-ethoxybenzoyl) -N, N-diethyl-1-isopentyl-1H-benzimidazole-5-carboxamide
MnOTwo(0.641 g, 7.37 mmol) under a nitrogen atmosphere in dry dioxane (4 ml) in 2- (4-ethoxybenzyl) -N, N-diethyl-1-isopentyl-1H-benzimidazole-5-carboxamide (0. (211 g, 0.500 mmol). The reaction mixture was heated to 50C. After 64 hours, additional MnOTwo(0.600 g, 6.90 mmol) was added and heating was continued at 50 ° C. for an additional 24 hours. The reaction mixture was cooled to room temperature and CHTwoClTwoAnd filtered over diatomaceous earth. Add solid to CHTwoClTwoAnd the filtrate was concentrated to obtain a crude product. Purification by column chromatography (1: 1 EtOAc: heptane) provided the title compound (0.139 g, 64%) as a viscous colorless oil.
1H NMR (CDThreeOD): δ8.19 (d, J = 9.6 Hz, 2H), 7.83 (s, 1H), 7.72 (d, J = 8.4 Hz, 1H), 7.48 (dd, J = 8.4 Hz, J = 1.6 Hz, 1H), 7.01 (d, J = 9.2 Hz, 2H), 4.53 (dd, J = 7.6 Hz, J = 7.2 Hz, 2H), 4.13 (q, J = 6.4 Hz, 2H), 3.58 (br s, 2H ), 3.36 (br s, 2H), 1.78-1.70 (m, 2H), 1.72-1.56 (m, 1H), 1.41 (t, J = 7.2 Hz, 3H), 1.34-1.10 (2 × br s, 6H ), 0.94 (d, J = 6.8 Hz, 6H).
13C-NMR (CDThreeOD):? . MS (ESI) (M + H)+= 436.
Analytical value (C26H33NThreeOThree・ 0.5 HTwoO):
Calculated: C, 70.24; H, 7.71; N, 9.45.
Found: C, 70.40; H, 7.64; N, 8.97.
[0151]
Example 19:
2- (4-ethoxybenzoyl) -N, N-diethyl-1-isopentyl-1H-benzimidazole-5-carbothioamide
Lawesson's reagent (0.0963 g, 0.238 mmol) was treated with 2- (4-ethoxybenzoyl) -N, N-diethyl-1-isopentyl-1H-benzimidazole-5-carboxamide in dry toluene (5 ml) under a nitrogen atmosphere. (0.0451 g, 0.104 mmol) to a stirred solution. The reaction mixture was heated at reflux for 0.5 hours, then cooled to room temperature and concentrated. The residue was purified by column chromatography (3: 1 hexane: EtOAc) to give the title compound (0.0137 g, 29%) as a yellow solid on glass.
1H NMR (CDThreeOD): δ8.19 (d, J = 9.2 Hz, 2H), 7.67 (d, J = 8.4 Hz, 1H), 7.64 (s, 1H), 7.36 (d, J = 8.4 Hz, 1H), 7.06 ( d, J = 9.2 Hz, 2H), 4.55 (dd, J = 8.4 Hz, J = 7.2 Hz, 2H), 4.17 (q, J = 7.6 Hz, 4H), 3.53 (q, J = 7.6 Hz, 2H) , 1.80-1.71 (m, 2H), 1.71-1.58 (m, 1H), 1.44 (t, J = 7.6Hz, 3H), 1.41 (t, J = 7.6Hz, 3H), 1.17 (t, J = 7.6 Hz, 3H), 0.97 (d, J = 6.4 Hz, 6H).
13C-NMR (CDThreeOD):? MS (ESI) (M + H)+= 452.
Analytical value (C26H33NThreeOTwoS0.3 HTwoO):
Calculated: C, 68.33; H, 7.41; N, 9.19.
Found: C, 68.44; H, 7.52; N, 9.01.
[0152]
Example 20:
N-cyclohexyl-1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -N-methyl-1H-benzimidazole-5-carboxamide
20A: 4-[(cyclopropylmethyl) amino] -3-nitrobenzonitrile
According to General Procedure 2B, 733 mg (4.42 mmol) of 4-fluoro-3-nitrobenzonitrile in 80% aqueous ethanol (20 mL) was added to cyclopropylmethylamine (377 mg, 5.3 mmol) at room temperature. . The mixture was stirred at 60 ° C. for 3 hours and worked up. The crude product (920 mg, 96%) was used for next step without further purification.
1H-NMR (400 MHz, CDClThree): δ8.52 (s, 1H), 8.51-8.47 (br, 1H), 7.59 (d, J = 8.4 Hz, 1H), 6.90 (d, J = 8.4 Hz, 1H), 3.22-3.20 (m, 2H), 1.25-1.15 (m, 1H), 0.73-0.59 (m, 2H), 0.42-0.35 (m, 2H). MS (ESI) [2 × (M + H)+]: 436.
[0153]
20B: 3-Amino-4-[(cyclopropylmethyl) amino] benzonitrile
According to General Procedure 2C, crude 4-[(cyclopropylmethyl) amino] -3-nitrobenzonitrile (920 mg, 4.24 mmol) was hydrogenated (35 psi) in 40 ml of EtOAc for 2 hours to give the crude product obtained. 750 mg (95%) of the product were used in the next step without further purification. MS (ESI) (M + H)+= 188
[0154]
20C: 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazole-5-carbonitrile
Following general procedure 2C, freshly prepared (4-ethoxyphenyl) acetyl chloride (from 793 mg of acid, 4.4 mmol) and crude 3-amino-4-[(cyclopropylmethyl) amino] benzonitrile (750 mg, (4.01 mmol) in acetic acid (HOAc) overnight. After work-up, the crude residue was purified by silica gel column chromatography to give the pure product (1.04 g, 78%) as an off-white solid.
1H NMR (400 MHz, CDClThree): δ8.08 (s, 1H), 7.50 (d, J = 8.4 Hz, 1H), 7.38 (d, J = 8.4 Hz, 1H), 7.14 (d, J = 8.4 Hz, 2H), 6.84 (d , J = 8.4 Hz, 2H), 4.29 (s, 2H), 4.01 (d, J = 7.6 Hz, 2H), 3.96 (q, J = 7.6 Hz, 2H), 1.39 (t, J = 7.6 Hz, 3H ), 1.04-1.00 (m, 1H), 0.58-0.53 (m, 2H), 0.29-0.25 (m, 2H). MS (ESI) (M + H)+= 332.
Analytical value (Ctwenty oneHtwenty oneNThreeO ・ 0.1 HTwoO):
Calculated: C, 75.50; H, 6.41; N, 12.61.
Found: C, 75.76; H, 6.72; N, 12.45.
[0155]
20D: 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazole-5-carboxylic acid
1: 1 EtOH: HTwoTo a solution of 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazole-5-carbonitrile (500 mg, 1.51 mmol) in O (16 ml) was added KOH (338 mg, 6.16 mmol). 04 mmol) was added. The resulting mixture was refluxed for 36 hours. The mixture was acidified with 1N HCl to pH 66.0, the precipitate was collected by filtration and the resulting white solid (520 mg, 99%) was used for the next step without further purification. An analytically pure compound was obtained by recrystallization (from EtOH: water).
1H-NMR (400 MHz, CDThreeOD): δ8.25 (s, 1H), 7.89 (d, J = 8.4 Hz, 1H), 7.47 (d, J = 8.4 Hz, 1H), 7.18 (d, J = 8.2 Hz, 2H), 6.82 ( d, J = 8.2 Hz, 2H), 4.28 (s, 2H), 4.06 (d, J = 6.8 Hz, 2H), 3.89 (q, J = 7.6 Hz, 2H), 1.32 (t, J = 7.6 Hz, 3H), 1.06-0.92 (m, 1H), 0.50-0.48 (m, 2H), 0.32-0.26 (m, 2H). MS (ESI) (M + H)+= 351.
Analytical value (Ctwenty oneHtwenty twoNTwoOThree・ As 0.7HCl):
Calculated: C, 67.09; H, 6.09; N, 7.45.
Found: C, 66.98; H, 6.31; N, 7.09.
[0156]
20E: N-cyclohexyl-1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -N-methyl-1H-benzimidazole-5-carboxamide
1- (Cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazole-5-carboxylic acid (80 mg, 0.228 mmol) was dissolved in DMF (2 ml) and then HATU (104 mg, 0 .274 mmol), followed by DIPEA (48 μL, 0.274 mmol). After stirring for 10 minutes, cyclohexylmethylamine (0.456 mmol) was added and the resulting mixture was stirred overnight. The mixture was diluted with EtOAc (50 ml) and saturated NaHCOThree(2 × 10 ml), then HTwoWash with O (2 × 10 ml), MgSOFourDry over and concentrate to give the crude amide. The crude residue was purified by silica gel column chromatography, and the pure product obtained was treated with a 1M HCl solution in dimethyl ether to give the HCl salt as a white solid (93 mg, 78%).
1H NMR (400 MHz, CDThreeOD): δ 7.66 (s, 1H), 7.58 (d, J = 8.0 Hz, 1H), 7.30 (d, J = 8.0 Hz, 1H), 7.16 (d, J = 8.6 Hz, 2H), 6.84 (d , J = 8.6 Hz, 2H), 4.30 (s, 2H), 4.10-4.04 (m, 5H), 3.96 (q, J = 7.6 Hz, 2H), 3.66-3.54 (m, 1H), 1.90-1.50 ( m, 10H), 1.33 (t, J = 7.6 Hz, 3H), 1.10-0.98 (m, 1H), 0.50-0.42 (m, 2H), 0.32-0.27 (m, 2H). MS (ESI) (M + H)+= 446.
Analytical value (C28H35NThreeOTwo・ As 2.2HCl):
Calculated: C, 63.96; H, 7.13; N, 7.99.
Found: C, 64.11; H, 7.24; N, 7.73.
[0157]
Example 21:
1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -5- (1-pyrrolidinylcarbonyl) -1H-benzimidazole
According to general procedure 20E, 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazole-5-carboxylic acid (80 mg, 0.228 mmol)
Was dissolved in DMF (2 ml) and HATU (104 mg, 0.274 mmol) was added followed by DIPEA (48 μL, 0.274 mmol). After stirring for 10 minutes, pyrrolidine (0.456 mmol) was added and the resulting mixture was stirred overnight. The crude residue after work-up is purified by silica gel column chromatography and the pure product obtained is treated with a 1M solution of HCl in diethyl ether to give the HCl salt (82 mg, 79%) as a white solid. Was.
1H-NMR (400 MHz, CDThreeOD): δ 7.85 (s, 1H), 7.59 (d, J = 8.6 Hz, 1H), 7.48 (d, J = 8.6 Hz, 1h), 7.18 (d, J = 8.1 Hz, 2H), 6.87 (d, J = 8.1 Hz, 2H), 4.32 (s, 2H), 4.07 (d, J = 6.8 Hz, 2H), 4.00 (q, J = 7.6 Hz ,, 2H), 3.64 (t, J = 7.2 Hz, 2H), 3.53 (t, J = 7.2 Hz, 2H), 2.06-1.96 (m, 2H), 1.96-1.85 (m, 2H), 1.36 (t, J = 7.6 Hz, 3H), 1.10-1.04 (m, 1H), 0.52-0.46 (m, 2H), 0.34-0.28 (m, 2H). MS (ESI) (M + H)+= 404.
Analytical value (Ctwenty fiveH29NThreeOTwo• as 1.5 HCl):
Calculated: C, 65.53; H, 6.71; N, 9.17.
Found: C, 65.48; H, 6.77; N, 8.75.
[0158]
Example 22:
1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -5- (1-pyrrolidinylcarbothioyl) -1H-benzimidazole
Free base 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -5- (1-pyrrolidinylcarbonyl) -1H-benzimidazole in pyridine (2 ml) (Example 21, 80 mg of 1- ( Cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazole-5-carboxylic acid)TwoSFive(507 mg, 1.14 mmol) was added. The mixture was heated to 100 C for 24 hours and cooled to room temperature. After decanting, the supernatant was concentrated, the residue was diluted with EtOAc (20 ml), 1N NaOH (2 × 10 ml) and then HTwoWashed with O (2 × 10 ml). Organic layer MgSOFourDried on top and evaporated. The crude residue was purified by silica gel column chromatography to give an oil (59 mg, 59% over two steps).
1H NMR (400 MHz, CDThreeOD): δ 7.70 (s, 1H), 7.39 (d, J = 8.0 Hz, 1H), 7.28 (d, J = 8.0 Hz, 1H), 7.12 (d, J = 8.4 Hz, 2H), 6.81 (d , J = 8.4 Hz, 2H), 4.27 (s, 2H), 4.08-3.95 (m, 4H), 3.89 (d, J = 6.8 Hz, 2H), 3.57 (t, J = 7.2 Hz, 2H), 2.14 -2.03 (m, 2H), 2.00-1.92 (m, 2H), 1.38 (t, J = 7.2 Hz, 3H), 1.06-0.98 (m, 1H), 0.54-0.48 (m, 2H), 0.28-0.22 (m, 2H). MS (ESI) (M + H)+= 420.
[0159]
Example 23:
1- (cyclopropylmethyl) -2-[(5-ethoxy-2-pyridinyl) methyl] -5- (1-pyrrolidinylcarbonyl) -1H-benzimidazole
23A: [5- (benzyloxy) -2-pyridinyl] acetic acid
[5- (benzyloxy) -2-pyridinyl] acetonitrile (obtained in 6 steps from 6-methyl-3-pyridinol in MeOH (9 ml). WM Golebiewski and JT Wrobel, Bull. Pol. Acad. Sci., 1990. , 38, 17) To a solution of 1.45 g (6.46 mmol) was added 25% NaOH (3 ml). The reaction mixture was stirred under reflux for 48 hours. After cooling, most of the MeOH is removed under vacuum and H 2TwoO (10 ml) was added and the aqueous solution was washed with diethyl ether (2 × 10 ml) and then acidified (pHpH6.0). The mixture was extracted with EtOAc (3 × 20 ml) and extracted with MgSOFourDry over and concentrate to give pale yellow crystals (1.4 g, 89%). MS (ESI) (M + H)+= 244
[0160]
23B: 2-{[5- (benzyloxy) -2-pyridinyl] methyl} -1- (cyclopropylmethyl) -1H-benzimidazole-5-carbonitrile
According to General Procedure 13B, 360 mg of [5- (benzyloxy) -2-pyridinyl] acetic acid was coupled with 3-amino-4-[(cyclopropylmethyl) amino] benzonitrile using HATU. The resulting intermediate was heated at 90 ° C. overnight in HoAc (20 ml). After concentration, the crude residue was purified by silica gel column chromatography to give the pure product as an oil (230 mg, 40% over two steps). MS (ESI) (M + H)+= 395
[0161]
23C: 1- (cyclopropylmethyl) -2-[(5-hydroxy-2-pyridinyl) methyl] -1H-benzimidazole-5-carbonitrile
Of 2-{[5- (benzyloxy) -2-pyridinyl] methyl} -1- (cyclopropylmethyl) -1H-benzimidazole-5-carbonitrile (200 mg, 0.51 mmol) in EtOH (10 ml) To the solution was added 10% Pd / C (20 mg). The mixture was hydrogenated (40 psi) overnight. After filtration and concentration, the crude product (120 mg, 77%) obtained as a pale yellow oil was used in the next step without further purification. MS (ESI) (M + H)+= 305
[0162]
23D: 1- (cyclopropylmethyl) -2-[(5-ethoxy-2-pyridinyl) methyl] -1H-benzimidazole-5-carbonitrile
MeONa was added to a solution of 1- (cyclopropylmethyl) -2-[(5-hydroxy-2-pyridinyl) methyl] -1H-benzimidazole-5-carbonitrile (120 mg, 0.394 mmol) in DMSO (1 ml). (25% in MeOH, 0.47 mmol) was added. After stirring at room temperature for 30 minutes, the MeOH was removed in vacuo, EtI (0.47 mmol) was added and the resulting mixture was stirred overnight at room temperature. H solutionTwoDilute with O (10 ml), extract with EtOAc (2 × 20 ml), add HTwoWash with O (2 × 10 ml) and finally MgSOFourDried on top. The residue obtained after evaporation was purified by silica gel column chromatography to give the pure product as an oil (84 mg, 64%).
1H NMR (400 MHz, CDClThree): δ 8.19 (d, J = 3.0 Hz, 1H), 8.04 (s, 1H), 7.49 (d, J = 8.4 Hz, 1H), 7.42 (d, J = 8.4 Hz, 1H), 7.24 (d, J = 8.8 Hz, 1H), 7.13 (dd, J = 10.0 Hz, J = 2.8 Hz, 1H), 4.47 (s, 2H), 4.15 (d, J = 6.8 Hz, 2H), 4.04 (q, J = 7.0 Hz, 2H), 1.41 (t, J = 7.0 Hz, 3H), 1.14-1.08 (m, 1H), 0.60-0.54 (m, 2H), 0.36-0.30 (m, 2H). MS (ESI) (M + H)+= 333.
[0163]
23E: 1- (cyclopropylmethyl) -2-[(5-ethoxy-2-pyridinyl) methyl] -1H-benzimidazole-5-carboxylic acid
1: 1 EtOH: HTwoTo a solution of 1- (cyclopropylmethyl) -2-[(5-ethoxy-2-pyridinyl) methyl] -1H-benzimidazole-5-carbonitrile (400 mg, 1.203 mmol) in O (12 ml). KOH (269 mg, 4.81 mmol) was added. The resulting mixture was refluxed for 36 hours. The mixture was acidified with 1N HCl to pH 66.0. The precipitate (397 mg, 94%) was used for next step without further purification. MS (ESI) (M + H)+= 352
[0164]
23F: 1- (cyclopropylmethyl) -2-[(5-ethoxy-2-pyridinyl) methyl] -5- (1-pyrrolidinylcarbonyl) -1H-benzimidazole
According to General Procedure 20E, 1- (cyclopropylmethyl) -2-[(5-ethoxy-2-pyridinyl) methyl] -1H-benzimidazole-5-carboxylic acid (80 mg, 0.228 mmol) was added to DMF ( 2TU) and HATU (104 mg, 0.274 mmol) was added followed by DIPEA (48 μL, 0.274 mmol). After stirring for 10 minutes, pyrrolidine was added and the resulting mixture was stirred overnight. The crude residue obtained after work-up was purified by reverse phase HPLC to give the TFA salt (42 mg, 37%) as a white solid.
1H NMR (400 MHz, CDThreeOD): δ 8.18 (d, J = 2.8 Hz, 1H), 7.98 (d, J = 9.2 Hz, 1H), 7.87 (s, 1H), 7.72 (dd, J = 9.2 Hz, J = 2.0 Hz, 1H ), 7.52 (d, J = 9.2 Hz, 1H), 7.46 (dd, J = 9.2 Hz, J = 2.8 Hz, 1H), 4.89 (s, 2H), 4.43 (d, J = 6.8 Hz, 2H), 4.09 (q, J = 7.2 Hz, 2H), 3.60 (t, J = 7.6 Hz, 2H), 3.44 (t, J = 7.6 Hz, 2H), 2.02-1.94 (m, 2H), 1.92-1.86 (m , 2H), 1.37 (t, J = 7.2 Hz, 3H), 1.30-1.22 (m, 1H), 0.64-0.58 (m, 2H), 0.48-0.44 (m, 2H). MS (ESI) (M + H)+= 405.
Analytical value (Ctwenty fourH28NFourOTwo・ 0.8 TFA ・ 0.2 HTwoO):
Calculated: C, 55.32; H, 5.12; N, 9.49.
Found: C, 55.30; H, 4.91; N, 9.23.
[0165]
Example 24:
1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -5- (4-morpholinylmethyl) -1H-benzimidazole
24A: 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazole-5-carbaldehyde
To a solution of 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazole-5-carbonitrile (0.049 g, 0.149 mmol) in 50% aqueous formic acid (1 ml) was added the catalyst. An amount of Raney nickel (50% suspension in water) was added and the resulting mixture was heated to 90 ° C. for 6 hours. The mixture was filtered through a short pad of diatomaceous earth and washed with EtOAc. The solvent was evaporated under vacuum and the residue was dissolved in EtOAc (5ml). The organic layer was washed with 1N NaOH (2 × 2 ml) and brine (2 ml),FourDry over, filter and concentrate under vacuum. The crude product was purified by silica gel column chromatography (40% ethyl acetate / hexane) to give the title compound (0.041 g, 82%) as a white solid.
1H NMR (acetone-d6): δ10.16 (s, 1H), 8.29 (s, 1H), 7.90 (d, J = 8.4Hz, 1H), 7.76 (d, J = 8.4Hz, 1H), 7.34 (d, J = 8.4Hz) , 2H), 6.94 (d, J = 8.4Hz, 2H), 4.44 (s, 2H), 4.24 (d, J = 6.4Hz, 2H) 4.07 (q, J = 6.8Hz, 2H), 1.40 (t, J = 7.0Hz, 3H), 1.27-1.14 (m, 1H), 0.58-0.49 (m, 2H), 0.48-0.38 (m, 2H). MS (ESI) (M + H)+= 335.
[0166]
24B: 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -5- (4-morpholinylmethyl) -1H-benzimidazole
1- (Cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazole-5-carbaldehyde (0.077 g, 0.231 mmol) in tetrahydrofuran (THF) (0.25 ml) and acetic acid ( To a solution of 0.135 ml (0.236 mmol) sodium triacetoxyborohydride (0.245 g, 0.268 mmol) was added and the resulting mixture was stirred at room temperature for 6 hours. Water (2 ml) and 1N HCl (5 ml) were added and the mixture was stirred for 10 minutes before washing with ethyl acetate (2 × 5 ml). The aqueous layer was basified with 5N NaOH (5ml) and extracted with EtOAc (3x10ml). The combined organic layers were washed with brine (5ml) and dried over MgSOFourDry over, filter and concentrate under vacuum. The crude product was purified by silica gel column chromatography (5% MeOH / EtOAc) and the resulting title compound (0.0445 g, 47%) was dissolved in 1 M HCl in diethyl ether, the solvent was evaporated and the oil was evaporated. The HCl salt of was obtained.
1H NMR (free base, CDClThree): δ7.68 (s, 1H), 7.28-7.23 (m, 2H), 7.14 (d, J = 8.4Hz, 2H), 6.81 (d, J = 8.4Hz, 2H), 4.26 (s, 2H) , 3.98 (q, J = 7.2Hz, 2H), 3.88 (d, 6.4H), 3.72-3.65 (m, 4H) 3.63 (s, 2H), 2.53-2.44 (m, 4H), 1.38 (t, J = 8.6 Hz, 3H), 1.07-1.00 (m, 1H), 0.53-0.48 (m, 2H), 0.29-0.22 (m, 2H). MS (ESI) (M + H)+= 406.
[0167]
Example 25:
1- [1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl] ethanone
25A: 1- [1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl] ethanol
To a solution of 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazole-5-carbaldehyde (2.32 g, 6.94 mmol) in THF (60 ml) at 0 ° C. was added THF. 3M methylmagnesium bromide in medium (13.9ml, 41.7mmol) was added and the resulting mixture was stirred at 0 ° C for 90 minutes. Water (50 ml) was added and the mixture was stirred for 10 minutes before extracting with EtOAc (3 × 10 ml). The combined organic layers were washed with brine (50 mL) and dried over MgSOFourDry over, filter and concentrate under vacuum. CH to crude productTwoClTwo(5 ml) was added and the resulting suspension was filtered, and the solid was washed with CH2.TwoClTwo(2 ml), dried and dried to give the title compound (1.915 g, 75%) as a white solid.
1H NMR (CDClThree): 7.74 (s, 1H), 7.31 (s, 2H), 7.12 (d, J = 8.4Hz, 2H), 6.79 (d, J = 8.0Hz, 2H), 5.03 (q, J = 6.3Hz, 2H ), 4.27 (s, 2H), 3.98 (q, J = 6.8Hz, 2H) 3.90 (d, J = 6.4Hz, 2H), 2.33 (br s, 1H), 1.56 (dj J = 6.4Hz, 3H) , 1.38 (t, J = 7.0Hz, 3H), 1.05-0.99 (m, 1H), 0.53-0.48 (m, 2H), 0.26-0.23 (m, 2H). MS (ESI) (M + H)+= 351.
Analytical value (Ctwenty twoH26NTwoOTwoAs):
Calculated: C, 75.40; H, 7.48; N, 7.99.
Found: C, 75.22; H, 7.32; N, 7.99.
[0168]
25B: 1- [1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl] ethanone
CHTwoClTwo1- [1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl] ethanol (1.35 g, 3.86 mmol), N-methylmorpholine in (10 ml) To a mixture of -N-oxide (0.497 g, 4.24 mmol) and 4 ° molecular sieve (2.0 g) was added tetrapropylammonium perthenate (0.068 g, 0.193 mmol) to give The resulting mixture was stirred at room temperature for 90 minutes. N-methylmorpholine-N-oxide (0.124 g, 1.06 mmol) and acetonitrile (1 ml) were added and the mixture was stirred overnight at room temperature. The solvent was concentrated in vacuo and the crude product was purified by silica gel column chromatography (30% EtOAc / hexane to 60% EtOAc / hexane) to give the title compound (0.880 g, 65%) as a white solid.
1H-NMR (CDClThree): δ 8.34 (s, 1H), 7.94 (dd, J = 8.4 Hz, J = 2.0 Hz, 1H), 7.35 (d, J = 8.4 Hz, 1H), 7.15 (d, J = 8.4 Hz, 2H) , 6.91 (dd, J = 6.4 Hz, J = 2.0 Hz, 2H), 4.29 (s, 2H), 3.98 (q, J = 7.2 Hz, 2H) 3.41 (d, J = 6.8 Hz, 2H), 2.67 ( s, 3H), 1.38 (t, J = 7.0 Hz, 3H), 1.07-1.00 (m, 1H), 0.55-0.51 (m, 2H), 0.29-0.26 (m, 2H).
13C-NMR (CDClThree): δ 198.71, 159.01, 156.43, 143.29, 140.01, 132.68, 130.44, 128.67, 123.50, 121.95, 115.83, 110.73, 64.38, 49.23, 34.63, 27.63, 15.76, 11.99, 5.20. MS (ESI) (M + H)+= 349.
Analytical value (Ctwenty twoHtwenty fourNTwoOTwo+ 0.1 HTwoO):
Calculated: C, 75.44; H, 6.96; N, 8.00.
Found: C, 75.48; H, 7.13; N, 8.01.
[0169]
Example 26:
Methyl-1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-ylcarbamate
26A: Methyl 4-fluoro-3-nitrophenylcarbamate
CHTwoClTwoTo a stirred solution of 4-fluoro-3-nitroaniline (10.30 g, 65.97 mmol), DIPEA (15.00 mL, 86.11 mmol) in (150 ml), methyl chloroformate (6.86 g, 72.11 mmol). (59 mmol) at 0 ° C. The reaction mixture was allowed to come to room temperature and then stirred overnight at room temperature. Mixture CHTwoClTwo(100 ml), washed with 3N HCl (50 ml), brine (20 ml) and dried over sodium sulfate. The solvent was removed to give the crude carbamate as a light brown solid (13.03 g, 92%).
[0170]
26B: Methyl 4-[(cyclopropylmethyl) amino] -3-nitrophenylcarbamate
According to general procedure 2B, a solution of methyl 4-fluoro-3-nitrophenylcarbamate (6.50 g, 30.35 mmol, from the previous step) in 80% aqueous ethanol (100 ml) was added with cyclopropanemethylamine (5. 00 ml, 57.65 mmol) at room temperature. The reaction mixture was heated at 60 C overnight. After usual work-up, the precipitated crude product was collected (8.21 g). MS (ESI) (M + H)+= 266
[0171]
26C: Methyl 3-amino-4-[(cyclopropylmethyl) amino] phenylcarbamate
According to General Procedure 2C, methyl 4-[(cyclopropylmethyl) amino] -3-nitrophenylcarbamate (8.21 g) was catalyzed with 10% Pd / C (500 mg) for 1 hour at 15-25 psi hydrogen pressure. While hydrogenating in ethyl acetate (100 ml). The reaction mixture was filtered over diatomaceous earth and the solvent was removed to give the desired diamine (4.0 g, 56% over two steps). This material was used in the next step without further purification. MS (ESI) (M + H)+= 236
[0172]
26D: Methyl-1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-ylcarbamate
According to General Procedure 13B, methyl 3-amino-4-[(cyclopropylmethyl) amino] phenylcarbamate (4.0 g, 17.0 mmol), DIPEA (5 ml), 4-ethoxyphenylacetic acid (3.06 g, 17.0 mmol) and HATU (7.10 g, 18.7 mmol) were combined. The desired product (3.34 g, 52%) precipitated out of the reaction mixture.
1H-NMR (CDClThree): δ7.65 (d, J = 2.0 Hz, 1H), 7.37 (br., 1H), 7.26 (d, J = 4 Hz), 7.12 (d, J = 9.0 Hz, 2H), 6.81 (d, J = 9.0 Hz, 2H), 6.74 (br., 1H), 4.25 (s, 2H), 3.98 (q, J = 7.4 Hz, 2H), 3.87 (d, J = 7.2 Hz, 2H), 3.79 (s , 3H), 1.38 (t, J = 7.4 Hz, 3H), 1.05-0.97 (m, 1H), 0.52-0.47 (m, 2H), 0.25-0.20 (m, 2H). MS (ES (M + H)+= 380.
[0173]
Example 27:
N- [1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl] -N, 5-dimethyl-3-isoxazolecarboxamide
27A: 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -N-methyl-1H-benzimidazol-5-amine
Concentrated H in THF (30 ml) at 0 ° CTwoSOFour(0.80 g, 8.10 mmol) in 1 M LiAlHFour  Freshly prepared AlH by dropwise addition to a THF solution (16 ml, 16 mmol)FourTo a cold (0 ° C.) solution (〜3 M) of methyl-1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-ylcarbamate (1.65 g, 4.35 mmol) Was added little by little. The reaction mixture was stirred overnight at room temperature, then EtOAc (5 ml), HTwoO (3 ml) and EtTwoO (100 ml) followed by NaTwoSOFour・ 5HTwoQuenched by careful addition of O (10 g). The reaction mixture was stirred until a clear solution formed, and the solid was filtered off. The filtrate was washed with NaTwoSOFourDry over and concentrate under vacuum to give the desired compound (1.21 g). The crude product was subjected to the next step without further purification.
[0174]
27B: N- [1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl] -N, 5-dimethyl-3-isoxazolecarboxamide
CHTwoClTwo1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -N-methyl-1H-benzimidazol-5-amine (100 mg, 0.30 mmol) and Et in (5 ml).ThreeTo a solution of N (200 mg, 0.20 mmol) was added 5-methyl-3-isoxazolecarbonyl chloride (0.1 ml) at room temperature. The reaction mixture was stirred overnight at room temperature and saturated NaHCOThree(1 ml). Et mixtureTwoDiluted with O (30 ml) and saturated NaHCOThreeAnd then with brine, and finally with NaTwoSOFourDried on top. After concentration, the resulting residue was purified by prep-HPLC to give the desired material as TFA salt (40 mg, 24%). TFA salt to HTwoO (10 ml) and saturated NaHCOThreeNeutralize with EtTwoExtracted with O (2 × 20 ml). The combined ethereal solution is washed with brine and NaTwoSOFourDry over and concentrate. The free base was converted to its HCl salt (20 mg).
1H-NMR (CDThreeOD): δ7.86 (br., 1H), 7.62 (br., 1H), 7.45 (br., 1H), 7.24 (d, J = 8.4 Hz, 2H), 6.93 (d, J = 8.4 Hz, 2H), 4.53 (s, 2H), 4.34 (d, J = 6.8 Hz, 2H), 4.00 (q, J = 7.0 Hz, 2H), 3.50 (s, 3H), 2.26 (s, 3H), 1.34 ( t, J = 7.0 Hz, 3H), 1.26-1.16 (m, 1H), 0.62-0.55 (m, 2H), 0.46-0.40 (m, 2H). MS (ESI) (M + H)+= 445. Analytical value (C26H28NFour0Three• as 1.15 HCl):
Calculated: C, 64.19; H, 5.92; N, 11.51.
Found: C, 64.59; H, 5.74; N, 10.97.
[0175]
Example 28:
Isopropyl-1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl-methyl) carbamate
CHTwoClTwo1- (Cyclopropylmethyl) -2- (4-ethoxybenzyl) -N-methyl-1H-benzimidazol-5-amine (67 mg, 0.20 mmol) and Et in (3 ml).ThreeTo a solution of N (0.1 ml) at room temperature was added isopropyl chloroformate (1M in toluene, 0.24 ml, 0.24 mmol). The reaction mixture was stirred overnight at room temperature and saturated NaHCOThree(1 ml). Et mixtureTwoDiluted with O (30 ml) and saturated NaHCOThreeAnd washed with brine, NaTwoSOFourDry over and concentrate. The obtained residue was purified by preparative HPLC to give a TFA salt (10 mg, 9%).
1H NMR (CDThreeOD): δ 7.87 (d, J = 8.4 Hz, 1H), 7.62 (d, J = 1.6 Hz, 1H), 7.50 (dd, J = 1.6, 8.4 Hz, 1H), 7.24 (d, J = 8.4 Hz , 2H), 6.93 (d, J = 8.4 Hz, 2H), 4.95-4.85 (m, 1H), 4.54 (s, 2H), 4.35 (d, J = 7.2 Hz, 2H), 4.01 (q, J = 6.8 Hz, 2H), 3.31 (s, 3H), 1.343 (t, J = 6.8 Hz, 3H), 1.27-1.19 (m, 1H), 1.19 (d, J = 5.6 Hz, 6H), 0.63-0.56 ( m, 2H), 0.47-0.42 (m, 2H). MS (ESI) (M + H)+= 422.
Analytical value (Ctwenty fiveH31NThreeOThree・ 1.35 TFA ・ 0.05 HTwoO):
Calculated: C, 57.72; H, 5.67; N, 7.29.
Found: C, 57.68; H, 5.33; N, 7.23.
[0176]
Example 29:
(2S) -N- [1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl] -N, 1-dimethyl-2-pyrrolidinecarboxamide in DMF (3 ml). To a solution of 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -N-methyl-1H-benzimidazol-5-amine (80 mg, 0.62 mmol) was added DIPEA (0.2 ml) and (2S ) -1-Methyl-2-pyrrolidinecarboxylic acid (80 mg, 0.62 mmol) was added. The reaction mixture was stirred at room temperature for 5 minutes, then HATU (280 mg, 0.73 mmol) was added. The reaction mixture was then stirred overnight at room temperature. Saturated NaHCOThree(1 ml) and HTwoO (20 ml) was added and the mixture was extracted with EtOAc (2 × 20 ml). The combined extracts were washed with saturated NaHCOThree(5 ml) and brine, NaTwoSOFourDry over and concentrate under vacuum and the resulting crude amine was purified by preparative HPLC to give the TFA salt (18 mg, 13%). MS (ESI) (M + H)+= 447.
[0177]
Example 30:
N1-T-butyl-N- [1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl] -N-methylurea
t-Butyl isocyanate (0.1 ml) was added to 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -N-methyl-1H-benzimidazol-5-amine (34 mg, 0 ml) in ethylene chloride (5 ml). .10 mmol), and then the reaction mixture was heated to 60 ° C. overnight. The crude product was purified by flash chromatography on silica gel (EtOAc) to give the desired urea (26 mg, 59%).
1H-NMR (CDClThree): Free base δ 7.61 (d, J = 2.0 Hz, 1H), 7.33 (d, J = 8.4 Hz, 1H), 7.16 (d, J = 8.4 Hz, 2H), 7.10 (dd, J = 2.0, 8.4 Hz, 1H), 6.83 (d, J = 8.4 Hz, 2H), 4.28 (s, 1H), 4.27 (s, 2H), 4.00 (q, J = 7.0 Hz, 2H), 3.93 (d, J = 6.8 Hz, 2H), 3.26 (s, 3H), 1.40 (t, J = 7.0 Hz, 3H), 1.28-1.20 (m, 1H), 1.25 (s, 9H), 0.58-0.53 (m, 2H), 0.31 -0.26 (m, 2H). MS (ESI) (M + H)+= 435. The HCl salt was prepared using HCl in diethyl ether.
Analytical value (C26H34NFourOTwo・ 1.20 HC1 ・ 1.10 CTwoH6O):
Calculated: C, 64.03; H, 7.96; N, 10.59.
Found: C, 64.10; H, 7.53; N, 10.30.
[0178]
Example 31:
N- [1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl] -N1-(2-methoxyphenyl) -N-methylthiourea
1-isothiocyanato-2-methoxybenzene (100 mg, 0.61 mmol) was treated with 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -N-methyl-1H-benzimidazole-5 in DMF (5 ml). -Added to a solution of the amine (100 mg, 0.30 mmol). The reaction mixture was heated to 50 C overnight. The crude product isolated after removing the solvent was chromatographed on silica gel (EtOAc / CHTwoClTwo1: 1) to give the desired product (85 mg, 57%).
1H NMR (CDClThree): Free base δ 8.26 (dd, J = 2.0, 8.4 Hz, 1H), 7.74 (d, J = 2.0 Hz, 1H), 7.50 (s, 1H), 7.43 (d, J = 8.4 Hz, 1H), 7.20 (dd, J = 1.6, 8.4 Hz, 1H), 7.15 (d, J = 8.4 Hz, 2H), 7.08-7.02 (m, 1H), 6.98-6.92 (m, 1H), 6.83 (d, J = 8.4 Hz, 2H), 6.75 (d, J = 8.4 Hz, 1H), 4.29 (s, 2H), 4.00 (q, J = 7.0 Hz, 2H), 3.96 (d, J = 6.8 Hz, 2H), 3.80 (s, 3H), 3.58 (s, 3H), 1.37 (t, J = 7.0 Hz, 3H), 1.10-1.00 (m, 1H), 0.59-0.52 (m, 2H), 0.32-0.25 (m, 2H ). MS (ESI) (M + H)+= 501.
[0179]
Example 32:
N-allyl-N- [1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl] acetamide
32A: N- (4-fluoro-3-nitrophenyl) acetamide
4-Fluoro-3-nitro-aniline (45.0 g) was added in small portions to acetic anhydride (150 ml) at room temperature. The reaction mixture was stirred at room temperature for 2 hours. The desired product precipitated and was collected and dried under vacuum (42.0 g, 70%).
[0180]
32B: N- {4-[(cyclopropylmethyl) amino] -3-nitrophenyl} acetamide
According to general procedure 2B, a solution of N- (4-fluoro-3-nitrophenyl) acetamide (15.4 g, 77.7 mmol) in 80% aqueous ethanol (150 ml) was added at room temperature with cyclopropane methylamine ( 10 ml) was added. The reaction mixture was heated under reflux overnight. After cooling to room temperature, HTwoO (300 ml) was added and the desired product precipitated out as an orange solid (18 g, 92%).
[0181]
32C: N- {3-amino-4-[(cyclopropylmethyl) amino] phenyl} acetamide
According to General Procedure 2C, N- {4-[(cyclopropylmethyl) amino] -3-nitrophenyl} acetamide (7.0 g, 28 mmol) was added at 10% Pd in a Parr shaker under 25 psi hydrogen pressure. Hydrogenation in ethyl acetate (300 ml) using / C (0.8 g). After work-up, the desired product was isolated (5.5 g, 89%).
[0182]
32D: N- [1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl] acetamide
Following general procedure 13B, N- {3-amino-4-[(cyclopropylmethyl) amino] phenyl} acetamide (5.50 g, 25.11 mmol) in DMF (100 ml), DIPEA (6.50 ml, (37.5 mmol), 4-ethoxyphenylacetic acid (5.40, 30.0 mmol) and HATU (11.40 g, 30.0 mmol) were stirred overnight at room temperature. The desired product was isolated (4.5 g, 86%).
1H-NMR (CDThreeOD): δ 7.89 (s, 1H), 7.44-7.36 (m, 2H), 7.13 (d, J = 8.4 Hz, 2H), 6.83 (d, J = 8.4 Hz, 2H), 4.25 (s, 2H) , 4.03-3.94 (m, 4H), 2.14 (s, 3H), 1.34 (t, J = 7.0 Hz, 3H), 1.06-0.96 (m, 1H), 0.48-0.41 (m, 2H), 0.29-0.22 (m, 2H). MS (ESI) (M + H)+= 364.
Analytical value (Ctwenty twoHtwenty fiveNThree0Two・ 1.5HTwoO):
Calculated: C, 67.67; H, 7.23; N, 10.76.
Found: C, 67.50; H, 7.12; N, 10.65.
[0183]
32E: N-allyl-N- [1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl] acetamide
Allyl bromide (0.3 ml) was added under nitrogen at room temperature in CHTwoClTwo50% KOH (15 ml), N- [1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl] acetamide (545 mg, 1.50 mmol) And n-BuFourNBr (64 mg, 0.2 mmol) was added to a well-stirred bilayer solution. The reaction mixture is stirred for 2 hours at room temperature and then HTwoDiluted with O (30 ml), CHTwoClTwo(2 × 50 ml). Combine the extracts and add saturated NaHCOThree, Washed with brine, NaTwoSOFourDried on top. The solvent was removed and the resulting yellowish residue (530 mg) was flash chromatographed on silica gel (MeOH / CH).TwoClTwo, 1:10) to give the product (510 mg, 84%).
1HNMR (CDClThree): δ 7.54 (d, J = 2.0 Hz, 1H), 7.31 (d, J = 8.4 Hz, 1H), 7.16 (d, J = 8.4 Hz, 2H), 7.02 (dd, J = 2.0,8.4 Hz, 1H), 6.84 (d, J = 8.4 Hz, 2H), 5.98-5.84 (m, 1H), 5.12-5.04 (m, 2H), 4.34 (d, J = 5.6 Hz, 2H), 4.27 (s, 2H) ), 4.01 (q, J = 7.6 Hz, 2H), 3.93 (d, J = 6.4 Hz, 2H), 1.88 (s, 3H), 1.39 (t, J = 7.6 Hz, 3H), 1.10-1.00 (m , 1H), 0.59-0.52 (m, 2H), 0.31-0.26 (m, 2H). MS (ESI) (M + H)+= 404. The HCl salt was prepared using HCl in diethyl ether.
Analytical value (Ctwenty fiveH29NThreeOTwo・ HC1 / 1.5HTwoO):
Calculated: C, 64.24; H, 7.07; N, 8.99.
Found: C, 63.96; H, 6.80; N, 8.84.
[0184]
Example 33:
N-allyl-1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-amine
To a solution of N-allyl-N- [1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl] acetamide (510 mg) in EtOH (20 ml) was added 20% KOH ( 20 ml) was added. The reaction mixture was heated under reflux overnight, then returned to room temperature. The mixture was concentrated under vacuum to about 20 ml and CHTwoClTwo(2 × 100 ml). The combined extracts were washed with brine and NaTwoSOFourDry over and concentrate under vacuum. The residue is chromatographed on silica gel (CHTwoClTwo/ MeOH 25: 1) to give a light yellow oil (400 mg, 87%).
1H NMR (CDThreeOD): δ 8.03 (br., 1H), 7.64 (br., 1H), 7.54 (br., 1H), 7.28 (d, J = 8.4 Hz, 2H), 6.96 (d, J = 8.4 Hz, 2H) ), 6.03-5.92 (m, 1H), 5.43 (d, J = 24.8 Hz, 1H), 5.40 (d, J = 18.8 Hz, 1H), 4.59 (s, 2H), 4.41 (d, J = 7.6 Hz) , 2H), 4.04 (d, J = 6.4 Hz, 2H), 4.03 (q, J = 6.4 Hz, 2H), 1.36 (t, J = 6.4 Hz, 3H), 1.30-1.18 (m, 1H), 0.66 -0.58 (m, 2H), 0.50-0.42 (m, 2H). MS (ESI) (M + H)+= 362. The HCl salt was prepared using HCl in diethyl ether.
Analytical value (Ctwenty threeH27NThreeO ・ 2HC1,1.25HTwoO):
Calculated: C, 60.46; H, 6.89; N, 9.19.
Found: C, 60.53; H, 6.64; N, 8.89.
[0185]
Example 34:
1- [1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl] -2-pyrrolidinone
34A: 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-amine
1: solution of N- [1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl] acetamide (727 mg, 2 mmol) in 120% KOH: EtOH (20 ml). Was stirred under reflux overnight. After cooling, the mixture was acidified with 1N HCl to pH 66.0 and the precipitate was collected by filtration to give the desired product as a pale yellow solid 611 mg (95%). MS (ESI) (M + H)+= 322.
[0186]
34B: 1- [1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-yl] -2-pyrrolidine
CHTwoClTwo1- (Cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-amine (72 mg, 0.22 mmol) and DIPEA (150 μM) in 4-mL (40 μL, 0.35 mmol). The reaction mixture was stirred at room temperature for 3 hours, then 50% KOH (3 ml) and n-BuFourNBr (5 mg) was added to the reaction mixture. The reaction mixture was stirred vigorously for 4 hours.TwoDiluted with O (10 ml), CHTwoClTwo(2 × 20 ml). Extract the combined extractTwoO, then brine, and NaTwoSOFourDry over and concentrate under vacuum, and the resulting crude lactam was purified by preparative TLC followed by preparative HPLC to give the desired product as a TFA salt (11 mg, 10%).
1H-NMR (CDThreeOD): δ 8.14 (d, J = 2.0 Hz, 1H), 7.91 (d, J = 9.2 Hz, lH), 7.80 (dd, J = 2.0, 9.2 Hz, 1H), 7.26 (d, J = 9.2 Hz, 2H), 6.95 (d, J = 9.2 Hz, 2H), 4.56 (s, 2H), 4.37 (d, J = 6.4 Hz, 2H), 4.03 (t, J = 7.6Hz, 2H), 4.01 ( q, J = 6.8 Hz, 2H), 2.63 (t, J = 8.4 Hz, 2H), 2.20 (tt, J = 7.6, 8.4 Hz, 2H), 1.36 (t, J = 6.8 Hz, 3H), 1.28- 1.18 (m, 1H), 0.64-0.57 (m, 2H), 0.49-0.42 (m, 2H). MS (ESI) (M + H)+= 390.
Analytical value (Ctwenty fourH27NThreeOTwo・ TFA ・ 0.1HTwoO):
Calculated: C, 61.80; H, 5.63; N, 8.32.
Found: C, 61.75; H, 5.30; N, 7.99.
[0187]
Example 35:
3- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -N, N-diethyl-3H-imidazo [4,5-b] pyridine-6-carboxamide
35A: 6-[(cyclopropylmethyl) amino] -5-nitronicotinic acid
Cyclopropanemethylamine (1.70 g, 23.90 mmol) was added at room temperature to a solution of 6-chloro-5-nitronicotinic acid (1.12 g, 5.53 mmol) in MeOH (25 ml). The reaction mixture was stirred for 2 hours at room temperature and concentrated under vacuum. HTwoThe solution was acidified by dissolving in O (20 ml) and adding 3N HCl until pH = 3. Mixture with EtOAc and CHTwoClTwo(2 × 100 ml) and the combined extracts were washed with brine and NaTwoSOFourDry over and concentrate under vacuum and the resulting light yellow solid (1.30 g) was used in the next reaction without further purification.
[0188]
35B: Methyl 6-[(cyclopropylmethyl) amino] -5-nitronicotinate
6-[(Cyclopropylmethyl) amino] -5-nitronicotinic acid (1.30 g) was dissolved in MeOH / toluene (1: 1, 60 ml) and TMSCHNTwo(2M in hexane, 6 ml) was added dropwise. The reaction mixture was stirred overnight at room temperature, concentrated under vacuum, and the resulting crude methyl ester (1.5 g) was used in the next step without further purification.
[0189]
35C: Methyl 5-amino-6-[(cyclopropylmethyl) amino] nicotinate
According to General Procedure 2C, methyl 6-[(cyclopropylmethyl) amino] -5-nitronicotinate (1.5 g) was added to 10% Pd / C (100 mg) in a Parr shaker under a hydrogen pressure of 20 psi for 2 hours. ) Was hydrogenated in ethyl acetate (50 ml). The reaction mixture was filtered over diatomaceous earth, the solvent was removed, and the resulting diamine (1.12 g) was used in the next step without further purification.
[0190]
35D: Methyl 3- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -3H-imidazo [4,5-b] pyridine-6-carboxylate
According to general procedure 13B, methyl 5-amino-6-[(cyclopropylmethyl) amino] nicotinate (950 mg, 44.3 mmol), DIPEA (1.1 lm), 4-ethoxyphenyl in DMF (15 ml) Acetic acid (850 mg, 4.72 mmol) and HATU (1.80, 4.74 mmol) were combined. The crude product was purified by flash chromatography on silica gel (EtOAc) to give the desired product (530 mg, 34%).
1HNMR (CDClThree): δ 9.00 (d, J = 2.0 Hz, 1H), 8.61 (d, J = 2.0 Hz, 1H), 7.17 (d, J = 8.0 Hz, 2H), 6.84 (d, J = 8.0 Hz, 2H) , 4.33 (s, 2H), 4.06 (d, J = 7.2 Hz, 2H), 4.00 (q, J = 7.0 Hz, 2H), 3.97 (s, 3H), 1.39 (t, J = 7.0 Hz, 3H) , 1.16-1.06 (m, 1H), 0.52-0.45 (m, 2H), 0.44-0.38 (m, 2H).
[0191]
35E: 3- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -3H-imidazo [4,5-b] pyridine-6-carboxylic acid
Methyl 3- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -3H-imidazo [4,5-b] pyridine-6-carboxylate (260 mg, 0 ml) in THF / MeOH (1: 1, 6 ml). (0.71 mmol) was added 1N NaOH (3 ml, 3 mmol). The reaction mixture was stirred at room temperature for 3 hours and concentrated under vacuum. HTwoDissolved in O (10 ml) and acidified by adding 1N HCl solution until pH = 5. The solid was collected (230 mg) and the filtrate was extracted with EtOAc (2 × 50 ml). Extract the NaTwoSOFourDry over and concentrate under vacuum to give more product (20 mg). The desired acid was produced in quantitative yield.
1H NMR (CDThreeOD): δ 8.93 (d, J = 1.6 Hz, 1H), 8.50 (d, J = 1.6 Hz, 1H), 7.15 (d, J = 9.2 Hz, 2H), 6.82 (d, J = 9.2 Hz, 2H) ), 4.33 (s, 2H), 4.11 (d, J = 6.4 Hz, 2H), 3.95 (q, J = 7.2 Hz, 2H), 1.31 (t, J = 7.2 Hz, 3H), 1.16-1.03 (m , 1H), 0.43-0.32 (m, 4H).
[0192]
35F: 3- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -N, N-diethyl-3H-imidazo [4,5-b] pyridine-6-carboxamide
Stirring solution of 3- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -3H-imidazo [4,5-b] pyridine-6-carboxylic acid (150 mg, 0.43 mmol) in DMF (5 ml) To the was added DIPEA (0.12 ml, 0.69 mmol) and diethylamine (60 μl, 0.58 mmol). The reaction mixture was stirred for 5 minutes at room temperature, then HATU (200 mg, 0.53 mmol) was added. The reaction mixture was stirred overnight at room temperature and then poured into ice water (20 ml) with stirring. The mixture was extracted with EtOAc (100ml) and the extract was washed with HTwoO (20 ml), NaTwoSOFourDry over and concentrate under vacuum. The residue was purified by flash chromatography on silica gel (EtOAc / MeOH, 20: 1) and the desired amide (115 mg, 64%) was equated using HCl in diethyl ether with methanol as co-solvent. HCl salt.
1HNMR (CDThreeOD): δ 8.46 (d, J = 2.0 Hz, 1H), 8.04 (d, J = 2.0 Hz, 1H), 7.21 (d, J = 8.4 Hz, 2H), 6.88 (d, J = 8.4 Hz, 2H) ), 4.46 (s, 2H), 4.24 (d, J = 7.2 Hz, 2H), 3.98 (q, J = 7.0 Hz, 2H), 3.57 (br, 2H), 3.32 (br, 2H), 1.33 (t , J = 7.0 Hz, 3H), 1.32-1.10 (m, 7H), 0.56-0.44 (m, 4H). MS (ESI) (M + H)+= 423.
Analytical value (Ctwenty fourH30NFourOTwo・ HC1 / 0.20 CHThreeOH):
Calculated: C, 64.68; H, 7.07; N, 12.48.
Found: C, 65.07; H, 7.13; N, 12.13.
[0193]
Example 36:
N-cyclopentyl-1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazole-5-sulfonamide
36A: 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazole-5-sulfonyl chloride
To a mixture of concentrated HCl (0.6 ml) and HOAc (0.18 ml) was added 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazol-5-amine (193 mg, 0.6 mmol). Was added. The resulting mixture is cooled to below -10 ° C and then HTwoNaNO in O (0.065 ml)Two(44.8 mg, 0.65 mmol) was added slowly and the mixture was stirred for 45 minutes at a temperature between -10 <0> C and -5 <0> C. In another flask, SOTwoWas bubbled in acetic acid (0.6 ml) for 30 minutes. CuCl (15 mg) is added and additional SO 2 is added until the yellow-green suspension turns blue-green.TwoWas bubbled. The solution containing copper was then cooled below 10 ° C. and the diazotized mixture was added dropwise with stirring. After all the diazonium salt has been added, the mixture is poured into ice-water (1: 1, 4 ml) and then extracted with dichloromethane (3 × 15 ml),TwoWash with O (2 × 10 ml), MgSOFourDrying on top and concentration gave a yellow oil (190 mg, 78%) which was used in the next reaction immediately after formation without further purification. MS (ESI) (M + H)+= 405.
[0194]
36B: N-cyclopentyl-1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazole-5-sulfonamide
To a crude solution of 1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazole-5-sulfonyl chloride (from 0.2 mmol of the aniline precursor) in dichloromethane (4 ml) was added cyclopentylamine ( 0.4 mmol) and then pyridine (0.5 ml). The resulting mixture was stirred overnight at room temperature. Water (10 ml) was added and the mixture was washed with CHTwoClTwo(2 × 10 ml) and extracted with MgSOFourDry over and concentrate. The residue was purified by silica gel column chromatography and the pure product obtained was treated with a 1 M solution of HCl in diethyl ether to form the HCl salt (62 mg, 81%).
1H NMR (400 MHz, CDThreeOD): δ8.29 (s, 1H), 7.78 (d, J = 8.0 Hz, 1H), 7.42 (d, J = 8.0 Hz, 1H), 7.16 (d, J = 8.4 Hz, 2H), 6.84 ( d, J = 8.4 Hz, 2H), 4.32 (s, 2H), 4.02-3.94 (m, 4H), 3.62-3.58 (m, 1H), 1.80-1.74 (m, 2H), 1.64-1.56 (m, 2H), 1.50-1.42 (m, 2H), 1.39 (t, J = 8.2 Hz, 3H), 1.42-1.34 (m, 2H), 1.08-1.00 (m, 1H), 0.58-0.54 (m, 2H) , 0.30-0.25 (m, 2H). MS (ESI) (M + H)+= 454.
Analytical value (Ctwenty fiveH31NThreeOThree(As S · 0.3HCl):
Calculated: C, 64.64; H, 6.79; N, 9.05.
Found: C, 64.45; H, 6.97; N, 8.66.
[0195]
Example 37:
1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -5-[(4-methyl-1-piperazinyl) sulfonyl] -1H-benzimidazole
According to general procedure 36B, CHTwoClTwo1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazole-5-sulfonyl chloride (from 0.2 mmol of aniline precursor), 1-methylpiperazine (0.4 ml) in (4 ml). Mmol) and pyridine (0.5 ml). The resulting mixture was stirred overnight at room temperature. The desired product was isolated as the HCl salt after column chromatography and treatment with a 1 M solution of HCl in diethyl ether (59 mg, 75%).
1H NMR (400 MHz, CDThreeOD): δ8.02 (s, 1H), 7.71 (d, J = 8.6 Hz, 1H), 7.64 (d, J = 8.6 Hz, 1H), 7.13 (d, J = 8.8 Hz, 2H), 6.83 ( d, J = 8.8 Hz, 2H), 4.80 (s, 3H), 4.31 (s, 2H), 4.10 (d, J = 7.2 Hz, 2H), 3.95 (q, J = 8.0 Hz, 2H), 3.04- 2.96 (m, 4H), 2.50-2.44 (m, 4H), 1.32 (t, J = 8.0 Hz, 3H), 1.08-0.98 (m, 1H), 0.47-0.43 (m, 2H), 0.31-0.26 ( m, 2H). MS (ESI) (M + 1)+: 469.
Analytical value (Ctwenty fiveH32NFourOThreeS ・ 2.7HC1 / 0.4HTwoO):
Calculated: C, 52.29; H, 6.23; N, 9.76.
Found: C, 52.54; H, 6.21; N, 8.67.
[0196]
Example 38:
1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -N-ethyl-1H-benzimidazole-5-sulfonamide
According to General Procedure 36B,
CHTwoClTwo1- (cyclopropylmethyl) -2- (4-ethoxybenzyl) -1H-benzimidazole-5-sulfonyl chloride (from 0.2 mmol of aniline precursor), ethylamine (2M solution in THF, 0 ml 0.4 mmol) and pyridine (0.5 ml). The resulting mixture was stirred overnight at room temperature. The desired product was isolated as the HCl salt after column chromatography and treatment with a 1M solution of HCl in diethyl ether (61 mg, 87%).
1H NMR (400 MHz, CDThreeOD): δ8.28 (s, 1H), 7.78 (d, J = 8.0 Hz, 1H), 7.42 (d, J = 8.0Hz, 1H), 7.15 (d, J = 8.8 Hz, 2H), 6.83 ( d, J = 8.8 Hz, 2H), 4.32 (s, 2H), 4.02-3.93 (m, 4H), 3.06-2.98 (m, 2H), 1.38 (t, J = 7.6 Hz, 3H), 1.10 (t , J = 8.0 Hz, 3H), 1.07-1.00 (m, 1H), 0.55-0.52 (m, 2H), 0.30-0.24 (m, 2H). MS (ESI) (M + H)+= 414.
Analytical value (Ctwenty twoH27NThreeOThreeS ・ as 1.1HC1):
Calculated: C, 58.25; H, 6.24; N, 9.26.
Found: C, 58.19; H, 6.73; N, 8.62.
[0197]
Example 39:
2- (4-ethoxyanilino) -N, N-diethyl-1-isopentyl-1H-benzimidazole-5-carboxamide
A solution of methyl 4-ethoxyphenyl dithiocarbamate (0.0274 g, 0.121 mmol) in DMF (0.2 ml) was prepared by adding 3-amino-N, N-diethyl-4- (isobutyl) in DMF (0.2 ml). (Pentylamino) benzamide (0.0334 g, 0.12 mmol) and red mercury (II) oxide (0.0261 g, 0.121 mmol). The resulting suspension was stirred vigorously for 5.5 hours, and additional red mercury (II) oxide (0.0130 g, 0.0600 mmol) was added. After stirring for a further 16 hours, the reaction mixture wasTwoClTwo: Diluted with MeOH, loaded onto a small plug of silica gel and eluted with the same solvent system. The eluate was concentrated and the residue was subjected to reverse phase HPLC (20-70% CH in water).Three(CN gradient) to give the title compound (0.0287 g, 45%) as a TFA salt. This substance is HTwoLyophilization from O / dioxane gave a white solid.
1H NMR (CDThreeOD): δ 7.60 (d, J = 8.4 Hz, 1 H), 7.44-7.38 (2 overlapping d, 3 H), 7.35 (s, 1 H), 7.11 (d, J = 9.2 Hz, 2 H) , 4.32 (br t, J = 7.2 Hz, 2 H), 4.12 (q, J = 7.6 Hz, 2 H), 3.56 (br s, 2 H), 3.32 (br s, 2 H), 1.85-1.76 ( br m, 3H), 1.43 (t, J = 7.6 Hz, 3 H), 1.25 (br s, 3 H), 1.14 (br s, 3 H), 1.08 (d, J = 6.4 Hz, 6 H).
13C-NMR (CDThreeOD):?
Analytical value (as): Calculated: MS (ESI) (M + H)+= 423.
[0198]
[Table 2]
Figure 2004528334
[0199]
For 61 and 62, Ki values were measured from two compounds prepared in one plate.
[0200]
Example 40
2-[(4-ethoxyphenyl) methyl] -N, N-diethyl-1- (3-thienylmethyl) -1H-benzimidazole-5-carboxamide
40A: N, N-diethyl-3-fluoro-4-nitro-benzamide
3-Fluoro-4-nitrobenzoic acid (5.0 g, 27.0 mmol) was added in 2: 1 CH overnight.TwoClTwo/ SOClTwo(150 ml) in a mixture. Concentrate the solvent and remove the residue in CHTwoClTwo(50 ml). Then another CH of dimethylamine (3.35 ml, 1.2 eq) and triethylamine (7.5 ml, 2 eq)TwoClTwoThe solution (50 ml) was added dropwise to a cold, stirred solution (0 ° C.) of the acid chloride. The solution was stirred for 1 hour at room temperature. Then the solution wasFourSolution, saturated NaHCOThreeSolution, washed with brine, anhydrous MgSOFourDried on top. The crude product was purified by flash chromatography on silica gel using 2: 1 hexane / EtOAc to give the title compound (5.10 g, 79% yield).
1H NMR (400 MHz, CDClThree) δ 8.12 (m, 1H), 7.29 (m, 2H), 3.56 (br d, 2H), 3.23 (brd, 2H), 1.27 (br s, 3H), 1.15 (br s, 3H).
[0201]
40B: 3-amino-N, N-diethyl-4-nitro-benzamide
N, N-Diethyl-3-fluoro-4-nitro-benzamide (5.1 g, 21.2 mmol) was treated with NH for 48 hours.FourReflux in a 2: 1 mixture of OH / EtOH (150 ml). The solution was cooled to room temperature and the solvent was concentrated. The solution was then extracted with EtOAc (3x). The combined organic layers were washed with brine and dried over anhydrous MgSO.FourDried on top. The crude product was crystallized from EtOAc / hexane to give the title compound (4.35 g, 86% yield).
1H NMR (400 MHz, CDThreeOD) δ 8.12 (d, J = 8.8 Hz, 1H), 6.92 (s, 1H), 6.56 (d, J = 8.8 Hz, 1H), 3.51 (q, J = 7.2 Hz, 2H), 3.28 (m, 2H), 1.23 (t, J = 7.2 Hz, 3H), 1.13 (t, J = 7.2 Hz, 3H).
[0202]
40C: N- [5-[(diethylamino) carbonyl] -2-nitrophenyl] -4-ethoxy-benzeneacetamide
To a stirred toluene solution (100 ml) of 3-amino-N, N-diethyl-4-nitro-benzamide (1.00 g, 4.21 mmol) was added 4-ethoxyphenylacetyl chloride (1.25 g, 1.5 equivalents). ) And zinc powder (415 mg, 1.5 eq) were added. The solution was stirred overnight at room temperature. Then a further 0.5 equivalents of acid chloride and zinc powder were added and the solution was stirred for a further 24 hours at room temperature. The solution was filtered through celite and washed with EtOAc. Organic layer is saturated NaHCOThreeSolution, washed with brine, anhydrous MgSOFourDried on top. The crude product was purified by flash chromatography on silica gel using 1: 1 hexane: ethyl acetate to give the desired product (1.52 g, 92% yield).
1H NMR (400 MHz, CDClThree) d 8.81 (s, 1H), 8.20 (d, J = 8.8 Hz, 1H), 7.26 (m, 3H), 7.15 (d, J = 8.8 Hz, 1H), 6.94 (d, J = 8.4 Hz, 2H ), 4.06 (q, J = 7.2 Hz, 2H), 3.75 (s, 2H), 3.54 (q, J = 6.8 Hz, 2H), 3.24 (q, J = 6.8 Hz, 2H), 1.59 (br s, 1H), 1.42 (t, J = 6.8 Hz, 3H), 1.25 (t, J = 6.8 Hz, 3H), 1.16 (t, J = 6.8 Hz, 3H).
[0203]
40D: N- [2-amino-5-[(diethylamino) carbonyl] phenyl] -4-ethoxy-benzeneacetamide
N- [5-[(Diethylamino) carbonyl] -2-nitrophenyl] -4-ethoxy-benzeneacetamide (1.00 g, 2.50 mmol) was added to a catalytic amount of 10% Pd / C in EtOAc (50 ml). Dissolved in. The solution was shaken overnight at room temperature under a hydrogen atmosphere (35 psi). The solution was filtered through celite and the solvent was concentrated. The title compound was sufficiently pure (> 95%) by LC / MS analysis and could be used directly in the next step. Yield: 927 mg (99%).
1H NMR (400 MHz, CDClThree) δ 7.54 (s, 1H), 7.25 (d, J = 7.6 Hz, 2H), 7.07 (s, 1H), 7.01 (d, J = 8.0 Hz, 1H), 6.91 (d, J = 7.2 Hz, 2H ), 6.66 (d, J = 8.4 Hz, 1H), 4.04 (q, J = 6.8 Hz, 2H), 3.69 (s, 2H), 3.39 (br s, 4H), 1.42 (t, J = 6.8 Hz, 3H), 1.15 (br s, 6H).
[0204]
40E: 2-[(4-ethoxyphenyl) methyl] -N, N-diethyl-1- (3-thienylmethyl) -1H-benzimidazole-5-carboxamide
N- [2-Amino-5-[(diethylamino) carbonyl] phenyl] -4-ethoxy-benzeneacetamide (100 mg, 0.271 mmol) was dissolved in 3 ml of a 2: 1 mixture of DCE: AcOH. Thiophene-3-carboxaldehyde (37 ml, 1.5 eq) was added and the solution was stirred for 15 minutes at room temperature. A borane / pyridine complex solution (55 ml, 2 eq) was added and the solution was stirred for 1 hour at room temperature. Several drops (5 drops) of concentrated hydrochloric acid were added and the solution was stirred at 85 ° C. for 3 hours. The solution was cooled to room temperature and the solvent was concentrated. The crude product is directly converted to 15-65% CHThreeCN / HTwoPurified by reverse phase chromatography (C-18 column) using a gradient of O, then lyophilized. The title compound was isolated as the corresponding TFA salt. Yield: 118 mg (78%).
1H-NMR (400 MHz, CDThreeOD) δ 7.78 (d, J = 8.4 Hz, 1H), 7.70 (s, 1H), 7.48 (d, J = 8.4 Hz 1H), 7.38 (m, 1H), 7.23 (s, 1H), 7.18 (d , J = 7.2Hz, 2H), 6.84 (m, 3H), 5.69 (s, 2H), 4.53 (s, 2H), 3.97 (q, J = 7.2 Hz, 2H), 3.54 (br s, 2H), 3.27 (br s, 2H), 1.34 (t, J = 7.2 Hz, 3H), 1.23 (br s, 3H), 1.10 (br s, 3H); MS (ESI) (M + H)+= 448.32;
Analytical value (C26H29NThreeOTwoS + 1.7 TFA + 0.1 HTwoO):
Calculated: C, 54.90; H, 4.84; N, 6.53.
Found: C, 54.88; H, 4.86; N, 6.53.
[0205]
Example 41
2-[(4-ethoxyphenyl) methyl] -N, N-diethyl-1-[(2R) -2-pyrrolidinylmethyl] -1H-benzimidazole-5-carboxamide
Using procedure 40E, N- [2-amino-5-[(diethylamino) carbonyl] phenyl] -4-ethoxy-benzeneacetamide (100 mg, 0.270 mmol) and N- (t-butoxycarbonyl) -D -Prolinal (76 mL, 1.5 eq) was used. The crude product is directly converted to 5-50% CHThreeCN / HTwoPurified by reverse phase chromatography (C-18 column) using a gradient of O, then lyophilized. The title compound was isolated as the corresponding TFA salt. Yield: 86 mg (78%).
1H-NMR (400 MHz, CDThreeOD) δ7.94 (d, J = 8.8Hz, 1H), 7.70 (s, 1H), 7.55 (d, J = 8.4Hz, 1H), 7.28 (d, J = 8.8 Hz, 2H), 6.94 ( d, J = 8.8 Hz, 2H), 4.83 (d, J = 7.2 Hz, 2H), 4.55 (s, 2H), 4.02 (q, J = 7.2 Hz, 2H), 3.96 (m, 1H), 3.56 ( br s. 2H), 3.48 (m, 1H), 3.27 (m, 3H), 2.24 (m, 1H), 2.14 (m, 1H), 2.04 (m, 1H), 1.87 (m, 1H), 1.36 ( t, J = 7.2 Hz, 3H), 1.26 (br s, 3H), 1.11 (br s, 3H); MS (ESI) (M + H)+= 435.45; Analysis value (C26H34NFourOTwo+ 2.2 TFA + 1.6 HTwoO):
Calculated: C, 51.12; H, 5.56; N, 7.84.
Found: C, 51.12; H, 5.62; N, 7.82.
[0206]
Example 42
2-[(4-ethoxyphenyl) methyl] -N, N-diethyl-1-[[(2S) -tetrahydro-2-furanyl] methyl] -1H-benzimidazole-5-carboxamide
N, N-diethyl-5-fluoro-3-nitrobenzamide (120 mg, 0.500 mmol), triethylamine (0.105 ml, 1.5 eq) and S-(+)-tetrahydrofurylamine (55 mg, 1. (1 equivalent) was stirred in 3 ml of EtOH at 85 ° C. for 3 hours. The solution was cooled to room temperature and the solvent was concentrated. The residue was dissolved in EtOAc and saturated NaHCOThreeSolution, washed with brine, anhydrous MgSOFourDried on top. The adduct was purified by flash chromatography on silica gel using 3: 1 hexane / EtOAc. Yield: 147 mg (92%).
1H NMR (400 MHz, CDClThree) δ8.35 (s, 1H), 8.25 (s, 1H), 7.53 (d, J = 8.8 Hz, 1H), 6.89 (d, J = 8.8 Hz, 1H), 4.17 (m, 1H), 3.92 ( m, 1H), 3.82 (m, 1H), 2.08 (m, 5H), 2.05 (m, 1H), 1.93 (m, 2H), 1.69 (m, 2H), 1.19 (t, J = 6.8Hz, 3H ).
[0207]
The nitro compound (125 mg, 0.389 mmol) was then dissolved in 20 ml of EtOAc containing a catalytic amount of 10% Pd / C. The solution was shaken under a hydrogen atmosphere (40 psi) at room temperature for 6 hours. The solution was filtered through celite and the solvent was concentrated to give the desired aniline. Yield: 113 mg (99%); MS (ESI) (M + H).+= 292.31
The aniline (113 mg, 0.388 mmol) was stirred with 4-ethoxyphenylacetyl chloride (85 mg, 1.1 eq) for 30 minutes at room temperature in 2 ml of dichloroethane. Several drops (5 drops) of concentrated hydrochloric acid were added and the solution was stirred at 85 ° C. for 3 hours. The solution was cooled to room temperature and the solvent was concentrated. The crude product is directly converted to 15-65% CHThreeCN / HTwoPurification by reverse phase chromatography (C-18 column) using a gradient of O followed by lyophilization gave the title compound. The product was isolated as the corresponding TFA salt. Yield: 148 mg (69%).
1H NMR (400 MHz, CDThreeOD) δ7.99 (d, J = 8.4 Hz, 1H), 7.68 (s, 1H), 7.58 (d, J = 8.8.Hz, 1H), 7.28 (d, J = 8.8 Hz, 2H), 6.97 ( d, J = 8.4 Hz, 2H), 4.70 (d, J = 14.8Hz, 1H), 4.60 (s, 2H), 4.51 (m, 1H), 4.21 (m, 1H), 4.02 (q, J = 7.2 Hz, 2H), 3.89 (m, 1H), 3.73 (m, 1H), 3.57 (br d, 2H), 3.27 (br s, 2H), 2.18 (m, 1H), 1.97 (m, 2H), 1.76 (m, 1H), 1.36 (t, J = 7.2 Hz, 3H), 1.26 (br s, 3H), 1.11 (br s, 3H); MS (ESI) (M + H)+= 436.43;
Analytical value (C26H33NThreeOThree+ 2.5 TFA + 0.4 HTwoO):
Calculated: C, 52.64; H, 5.23; N, 6.06.
Found: C, 52.59; H, 5.08; N, 6.33.
[0208]
Example 43
2-[(4-ethoxyphenyl) methyl] -N, N-diethyl-1-[[(2R) -1-methyl-2-pyrrolidinyl] methyl] -1H-benzimidazole-5-carboxamide
N- [2-amino-5-[(diethylamino) carbonyl] phenyl] -4-ethoxy-benzeneacetamide (85 mg, 0.230 mmol) and N- (t-butoxycarbonyl) -D-prolinal (0.06 ml, (1.5 equivalents) and cyclized as described in Example 40E. Then the solvent was concentrated. The residue was dissolved in MeOH and 37% formaldehyde in water (formalin) (few drops, excess) was added, followed by sodium cyanoborohydride (43 mg, 3 eq). The solution was then stirred for 1 hour at room temperature. The crude product is directly converted to 15-65% CHThreeCN / HTwoPurification by reverse phase chromatography (C-18 column) using a gradient of O followed by lyophilization gave the title compound (46 mg, 36% yield) as the corresponding TFA salt.
1H NMR (400 MHz, CDThreeOD) δ 7.80 (d, J = 8.8 Hz, 1H), 7.69 (s, 1H), 7.48 (d, J = 8.4 Hz, 1H), 7.22 (d, J = 8.8 Hz, 2H), 6.92 (d , J = 8.4 Hz, 2H), 4.85 (m, 1H), 4.66 (m, 1H), 4.49 (s, 2H), 4.01 (q, J = 7.2 Hz, 2H), 3.78 (br s, 2H), 3.56 (br s, 2H), 3.27 (br s, 3H), 2.95 (s, 3H), 2.02 (m, 3H), 1.85 (m, 1H), 1.35 (t, J = 7.2 Hz, 3H), 1.25 (br s, 3H), 1.11 (br s, 3H); MS (ESI) (M + H)+= 449.45;
Analytical value (C27H36NFourOTwo+ 2.4 TFA + 1.1 HTwoO):
Calculated: C, 51.47; H, 5.51; N, 7.55.
Found: C, 51.46; H, 5.43; N, 7.67.
[0209]
Examples 44 and 45
2-[(4-ethoxyphenyl) methyl] -N, N-diethyl-1-[[(2R) -1-methyl-2-piperidinyl] methyl] -1H-benzimidazole-5-carboxamide and 2-[( 4-ethoxyphenyl) methyl] -N, N-diethyl-1-[[(2S) -1-methyl-2-piperidinyl] methyl] -1H-benzimidazole-5-carboxamide
Following the procedure of Example 40E, N- [2-amino-5-[(diethylamino) carbonyl] phenyl] -4-ethoxy-benzeneacetamide (70 mg, 0.189 mmol) and 2-N- (t-butoxycarbonyl) ) -1-Piperidinecarboxaldehyde (52 mg, 1.5 eq) was used. The crude product was then dissolved in MeOH (3 ml) containing a few drops of glacial acetic acid. Excess 37% HCHO / HTwoO was added followed by NaCNBH3 (24 mg, 2 eq). The solution was stirred at room temperature for 30 minutes. The solvent was concentrated and the crude product was directlyThreeCN / HTwoPurification by reverse phase chromatography (C-18 column) using a gradient of O then lyophilization gave the desired product as a mixture of the two enantiomers. The product was isolated as the corresponding TFA salt. Yield: 53 mg (50%). The two enantiomers were separated by chiral chromatography using a chiral AD column with isocratic elution of 30% iPrOH / hexane containing 0.1% diethylamine, and the two enantiomers, 2-[(4-ethoxy) [Phenyl] methyl] -N, N-diethyl-1-[[(2R) -1-methyl-2-piperidinyl] methyl] -1H-benzimidazole-5-carboxamide (20 mg, 50%) and 2-[(4 -Ethoxyphenyl) methyl] -N, N-diethyl-1-[[(2S) -1-methyl-2-piperidinyl] methyl] -1H-benzimidazole-5-carboxamide (20 mg, 50%).
[0210]
Enantiomer: 2-[(4-ethoxyphenyl) methyl] -N, N-diethyl-1-[[(2R) -1-methyl-2-piperidinyl] methyl] -1H-benzimidazole-5-carboxamide
1H NMR (400 MHz, CDThreeOD) δ7.71 (br s, 1H), 7.68 (s, 1H), 7.43 (d, J = 8.4 Hz, 1H), 7.21 (d, J = 8.6 Hz, 2H), 6.92 (d, J = 8.6 Hz, 2H), 4.85 (s, 2H), 4.42 (s, 2H), 3.97 (q, J = 7.2 Hz, 2H), 3.55 (br s, 2H), 3.27 (m, SH), 3.03 (s, 3H), 2.98 (br s, 1H), 1.85 (br s, 1H), 1.74 (m, 3H), 1.50 (br s, 1H), 1.34 (t, J = 7.2 Hz, 3H), 1.25 (br s , 3H), 1.11 (br s, 3H). MS (ESI) (M + H)+= 463.51;
Analytical value (C28H38NFourOTwo+ 2.1 TFA + 0.6 HTwoO):
Calculated: C, 54.25; H, 5.84; N, 7.86.
Found: C, 54.24; H, 5.69; N, 8.17;
HPLCk': 1.99 (column: chiral AD, gradient 30% B for 25 min, flow 1 ml / min, 25 ° C; solvent A: 0.1% DEA in hexane, solvent B: 0.1% DEA in iPrOH).
[0211]
Enantiomer: 2-[(4-ethoxyphenyl) methyl] -N, N-diethyl-1-[[(2S) -1-methyl-2-piperidinyl] methyl] -1H-benzimidazole-5-carboxamide: 1H NMR, MS and elemental analysis are as for its enantiomer; HPLCk': 4.97 (column: chiral AD, gradient 30% B for 25 minutes, flow rate 1 ml / min, 25 ° C; solvent A: 0.1% DEA in hexane, solvent B: 0.1% DEA in iPrOH).
[0212]
Example 46
2-[(4-ethoxyphenyl) hydroxymethyl] -N, N-diethyl-1- (3-methylbutyl) -1H-benzimidazole-5-carboxamide
2- (4-Ethoxyphenyl) -N, N-diethyl-1- (3-methylbutyl) -1H-benzimidazole-5-carboxamide (110 mg, 0.252 mmol) was dissolved in 3 ml of EtOH. NaBHFour(12 mg, 1.2 eq) were added and the solution was stirred for 1 hour at room temperature. The solvent was concentrated and the residue was dissolved in EtOAc. Organic layer is saturated NaHCOThreeSolution, washed with brine, anhydrous MgSOFourDried on top. Crude product directly from 10-65% CHThreeCN / HTwoPurification by reverse phase chromatography (C-18 column) using a gradient of O followed by lyophilization gave the title compound. The product was isolated as the corresponding TFA salt. Yield: 102 mg (73%).
1H NMR (400 MHz, CDThreeOD) δ7.85 (br s, 2H), 7.62 (br s, 1H), 7.40 (br s, 2H), 7.01 (br s, 2H), 6.33 (br s, 1H), 4.29 (br s, 2H ), 4.06 (br s, 2H), 3.62 (br s, 2H), 3.32 (br s, 2H), 1.55 (br, 2H), 1.38 (br s, 3H), 1.30 (br s, 3H), 1.17 (br s, 2H), 0.90 (s, 3H), 0.83 (s, 3H); MS (ESI) (M + H)+= 438.30;
Analytical value (C26H35NThreeOThree+ 1.2 as TFA):
Calculated: C, 59.38; H, 6.35; N, 7.32.
Found: C, 59.36; H, 5.97; N, 7.37.
[0213]
Example 47
N- [2-[(4-ethoxyphenyl) methyl] -1- (3-thienylmethyl) -1H-benzimidazol-5-yl] -N, 3-dimethyl-butanamide
47A: Methyl (4-nitrophenyl) -carbamic acid 1,1-dimethylethyl ester
To a stirred solution of NaH (1.15 g, 1.5 eq, 60% in oil) in dry DMF (100 ml) at 0 ° C was added N-methyl-4-nitroaniline (3.00 g, 19.7 mmol). Of DMF (25 ml) was added. The solution was then stirred at 0 ° C. for 15 minutes. Then a solution of di-t-butyl dicarbonate (4.30 g, 1.2 eq) in DMF (50 ml) was added and the solution was vigorously stirred for 3 hours at room temperature. Saturated NH in solutionFourQuenched by adding Cl solution and concentrated the solvent. The residue was dissolved in EtOAc and saturated NaHCOThreeSolution, washed with brine, anhydrous MgSOFourDried on top. The crude product was purified by flash chromatography on silica using 4: 1 hexane / EtOAc to give 4.50 g of the desired product methyl (4-nitrophenyl) -carbamic acid 1,1-dimethylethyl ester (90% Yield).
1H NMR (400 MHz, CDClThree) δ 8.19 (d, J = 8.8 Hz, 2H), 7.46 (d, J = 8.8 Hz, 2H), 3.35 (s, 3H), 1.51 (s, 9H).
[0214]
47B: (3-amino-4-nitrophenyl) methyl-carbamic acid 1,1-dimethylethyl ester
Under nitrogen, a solution of t-BuOK (9.0 g, 4.5 eq) and CuCl (176 mg, 0.1 eq) in cold (0 ° C.) DMF (50 ml) was added methyl (4-nitrophenyl) -carbamine. A solution of the acid 1,1-dimethylethyl ester (4.49 g, 17.8 mmol) and methoxylamine hydrochloride (1.85 g, 1.25 eq) in DMF (100 ml) was added. The solution was allowed to return to room temperature over 1 hour. The reaction mixture is then brought to saturated NHFourQuenched with Cl and concentrated the solvent. The residue was diluted with water and extracted with EtOAc. The organic layer is washed with brine and dried over anhydrous MgSOFourDried on top. The crude product was purified by flash chromatography on silica gel using 2: 1 hexane / EtOAc to give the desired product (3-amino-4-nitrophenyl) methyl-carbamic acid 1,1-dimethylethyl ester (1 .10 g, 24% yield).
1H-NMR (400 MHz, CDClThree) δ8.06 (d, J = 9.2 Hz, 1H), 6.78 (s, 1H), 6.67 (d, J = 9.2 Hz 1H), 6.10 (br s, 2H), 3.28 (s, 3H), 1.50 ( s, 9H).
[0215]
47C: [3-[[(4-ethoxyphenyl) acetyl] amino] -4-nitrophenyl] methyl-carbamic acid 1,1-dimethyl ester
To a stirred toluene solution (100 ml) of (3-amino-4-nitrophenyl) methyl-carbamic acid 1,1-dimethylethyl ester (1.10 g, 4.12 mmol) was added 4-ethoxyphenylacetyl chloride (980 mg, .2 eq.) And zinc powder (400 mg, 1.5 eq.). The solution was stirred overnight at room temperature. A further 0.5 equivalents of acid chloride and zinc powder were added and the solution was stirred for a further 24 hours at room temperature. Then the solution was filtered through celite and washed with EtOAc. Organic layer is saturated NaHCOThreeSolution, washed with brine, anhydrous MgSOFourDried on top. The crude product is purified by flash chromatography on silica gel using 2: 1 hexane / EtOAc to give the desired product [3-[[(4-ethoxyphenyl) acetyl] amino] -4-nitrophenyl] methyl- There was obtained 1,1-dimethyl carbamic acid (1.18 g, 67% yield).
1H-NMR (400MHz, CDClThree) δ8.77 (s, 1H), 8.11 (d, J = 9.2 Hz, 1H), 7.22 (m, 3H), 6.93 (d, J = 9.2 Hz, 2H), 4.40 (m, 2H), 3.75 ( s, 2H), 3.33 (s, 3H), 1.50 (s, 9H), 1.42 (t, J = 6.8 Hz, 3H).
[0216]
47D: 4-ethoxy-N- [5- (methylamino) -2-nitrophenyl] -benzeneacetamide
[3-[[(4-Ethoxyphenyl) acetyl] amino] -4-nitrophenyl] methyl-carbamic acid 1,1-dimethyl ester (1.10 g, 2.56 mmol) is added for 2 hours at room temperature in 15 ml of 1M HCl / AcOH. With stirring. The solvent was concentrated. The residue was dissolved in EtOAc and saturated NaHCOThreeSolution, washed with brine, anhydrous MgSOFourDried on top. The product was used directly for the next step. Yield: 845 mg (99%).
1H NMR (400 MHz, CDClThree) δ 8.80 (d, J = 9.2 Hz, 1H), 8.02 (s, 1H), 7.25 (d, J = 6.8 Hz, 2H), 6.91 (d, J = 8.4 Hz, 2H), 6.22 (d, J = 9.2 Hz, 1H), 4.74 (br d, 1H), 4.04 (q, J = 7.2 Hz, 2H), 3.73 (s, 2H), 2.94 (s, 3H), 1.41 (t, J = 7.2 Hz , 3H).
[0217]
47E: 4-ethoxy-N- [5- [methyl (3-methyl-1-oxobutyl) amino] -2-nitrophenyl] -benzeneacetamide
1: 1 DCE: CH of 4-ethoxy-N- [5- (methylamino) -2-nitrophenyl] -benzeneacetamide (845 mg, 2.56 mmol) and DMAP (470 mg, 1.5 eq)ThreeIsovaleryl chloride (0.47 ml, 1.5 eq) was added to the CN solution (50 ml). The solution was stirred at room temperature for 48 hours. Then the solution wasFour, Saturated NaHCOThreeSolution, washed with brine, anhydrous MgSOFourDried on top. 7: 1 CHTwoClTwo: Purified by flash chromatography using ether to give the desired product, 4-ethoxy-N- [5- [methyl (3-methyl-1-oxobutyl) amino] -2-nitrophenyl] -benzeneacetamide (1 0.06 g, 99% yield).
1H NMR (400 MHz, CDClThree) δ8.72 (s, 1H), 8.21 (d, J = 8.8 Hz, 1H), 7.26 (m, 3H), 6.96 (m, 2H), 4.06 (m, 2H), 3.76 (s, 2H), 3.31 (s, 3H), 2.15 (m, 3H), 1.42 (t, J = 7.2 Hz, 3H), 0.88 (d, J = 6.8 Hz, 6H).
[0218]
47F: 4-ethoxy-N- [2-amino-5- [methyl (3-methyl-1-oxobutyl) amino] phenyl] -benzeneacetamide
4-ethoxy-N- [5- [methyl (3-methyl-1-oxobutyl) amino] -2-nitrophenyl] -benzeneacetamide (1.05 g, 2.53 mmol) was treated with a catalytic amount of 10% Pd / C. Was dissolved in EtOAc (50 ml). The solution was shaken under a hydrogen atmosphere (35 psi) at room temperature overnight. The solution was filtered through celite and the solvent was concentrated. The title compound was pure (> 95%) by LC / MS analysis and could be used directly in the next step. Yield: 965 mg (99%).
1H NMR (400 MHz, CDClThree) δ7.23 (d, J = 8.8 Hz, 2H), 7.12 (s, 1H), 7.00 (s, 1H), 6.93 (d, J = 8.8 Hz, 1H), 6.78 (m, 2H), 4.01 ( q, J = 7.0 Hz, 2H), 3.69 (s, 2H), 3.13 (s, 3H), 2.05 (m, 1H), 1.93 (d, J = 7.2 Hz, 2H), 1.39 (t, J = 7.2 Hz, 3H), 0.78 (d, J = 6.8 Hz, 6H).
[0219]
47G: N- [2-[(4-ethoxyphenyl) methyl] -1- (3-thienylmethyl) -1H-benzimidazol-5-yl] -N, 3-dimethyl-butanamide
According to the procedure of Example 40E, 4-ethoxy-N- [2-amino-5- [methyl (3-methyl-1-oxobutyl) amino] phenyl] -benzeneacetamide (75 mg, 0.196 mmol) and thiophene- 3-Carboxaldehyde (26 ml, 1.5 eq) was used. The crude product is directly converted to 15-65% CHThreeCN / HTwoPurified by reverse phase chromatography (C-18 column) using a gradient of O, then lyophilized. The title compound was isolated as the corresponding TFA salt. Yield: 55 mg (50%).
1H NMR (400 MHz, CDThreeOD) δ 7.54 (m, 2H), 7.30 (d, J = 4.8 Hz, 1H), 7.17 (d, J = 8.4 Hz, 1H), 7.12 (d, J = 8.4 Hz, 2H), 7.05 (s , 1H), 6.80 (d, J = 8.8 Hz, 2H), 6.70 (d, J = 5.2 Hz, 1H), 5.48 (s, 2H), 4.35 (s, 2H), 3.95 (q, J = 7.2 Hz , 2H), 3.23 (s, 3H), 2.03 (br s, 1H), 1.94 (br s, 2H), 1.31 (t, J = 7.2 Hz, 3H), 0.76 (br s, 6H); MS (ESI ) (M + H)+= 462.43;
Analytical value (C27H31NThreeOTwoS + 0.7 TFA + 0.5 HTwoO):
Calculated: C, 61.97; H, 5.99; N, 7.63.
Found: C, 61.88; H, 6.03; N, 7.62.
[0220]
Example 48
N- [2-[(4-ethoxyphenyl) methyl] -1-[(2R) -2-pyrrolidinylmethyl] -1H-benzimidazol-5-yl] -N, 3-dimethyl-butanamide
According to the procedure of Example 40E, 4-ethoxy-N- [2-amino-5- [methyl (3-methyl-1-oxobutyl) amino] phenyl] -benzeneacetamide (75 mg, 0.196 mmol) and N- (T-Butoxycarbonyl) -D-prolinal (55 mL, 1.5 equivalents) was used. The crude product is directly converted to 5-50% CHThreeCN / HTwoPurified by reverse phase chromatography (C-18 column) using a gradient of O, then lyophilized. The title compound was isolated as the corresponding TFA salt. Yield: 81 mg (73%).
1H NMR (CDThreeOD) δ 7.91 (d, J = 8.8 Hz, 1H), 7.59 (s, 1H), 7.43 (d, J = 8.8 Hz, 1H), 7.26 (d, J = 8.8 Hz, 2H), 6.93 (d , J = 8.8 Hz, 2H), 4.79 (d, J = 7.2 Hz, 2H), 4.53 (s, 2H), 3.98 (q, J = 7.2 Hz, 2H), 3.88 (m, 1H), 3.44 (m , 1H), 3.23 (s, 3H), 2.18 (m, 1H), 2.13 (m, 1H), 2.05 (m, 2H), 1.98 (m, 3H), 1.81 (m, 1H), 1.33 (t, J = 7.2 Hz, 3H), 0.78 (br s, 6H); MS (ESI) (M + H)+= 449.50;
Analytical value (C27H36NFourOTwo+ 2.3 TFA + 1.8 HTwoO):
Calculated: C, 51.06; H, 5.68; N, 7.54.
Found: C, 51.06; H, 5.73; N, 7.26.
[0221]
Example 49
N- [1-[[5-[(acetyloxy) methyl] -2-furanyl] methyl] -2-[(4-ethoxyphenyl) methyl] -1H-benzimidazol-5-yl] -N, 3- Dimethyl-butanamide
According to the procedure of Example 40E, 4-ethoxy-N- [2-amino-5- [methyl (3-methyl-1-oxobutyl) amino] phenyl] -benzeneacetamide (75 mg, 0.196 mmol) and 5-ethoxyacetamide [(Acetyloxy) methyl] -2-furancarboxaldehyde (50 mg, 1.5 equivalents) was used. The crude product is directly converted to 15-65% CHThreeCN / HTwoPurified by reverse phase chromatography (C-18 column) using a gradient of O, then lyophilized. The title compound was isolated as the corresponding TFA salt. Yield: 63 mg (51%).
1H NMR (400 MHz, CDThreeOD) δ 8.01 (d, J = 8.8 Hz, 1H), 7.64 (s, 1H), 7.49 (d, J = 8.8 Hz, lH), 7.27 (d, J = 8.4 Hz, 2H), 6.94 (d , J = 8.4 Hz, 2H), 6.50 (d, J = 3.2 Hz, 1H), 6.39 (d, J = 3.2 Hz, 1H), 5.75 (s, 2H), 4.92 (s, 2H), 4.68 (s , 2H), 4.00 (q, J = 7.2 Hz, 2H), 3.27 (s, 3H), 2.02 (m, 1H), 1.96 (br s, 5H), 1.36 (t, J = 7.2 Hz, 3H), 0.79 (s, 6H); MS (ESI) (M + H)+= 518. 49;
Analytical value (C30H35NThreeOFive+ 1.6 TFA + 0.6 HTwoO):
Calculated: C, 56.10; H, 5.36; N, 5.91.
Found: C, 56.14; H, 5.40; N, 5.95.
[0222]
Example 50
N- [2- (4-ethoxybenzyl) -1-[(2S) -2-pyrrolidinylmethyl] -1H-benzimidazol-5-yl] -N ', N- (1-isopropyl) urea
50A: N- [5- [methyl [[isopropylamino] carbonyl] amino] -2-nitrophenyl] -4-ethoxybenzeneacetamide
A mixture of 4-ethoxy-N- [5- (methylamino) -2-nitrophenyl] -benzeneacetamide (2.20 g, 6.69 mmol) in 1,2-dichloroethane (100 ml) was stirred at room temperature under nitrogen at room temperature. During this time, triphosgene (1.99 g, 6.69 mmol) and TEA (0.93 ml, 6.69 mmol) were added. After 30 minutes, DMAP (817 mg, 6.69 mmol) and isopropylamine (3.42 ml, 40.0 mmol) were added and the contents were stirred at 45 ° C. for 16 hours. Saturated NaHCOThreeThe mixture was quenched with an aqueous solution (40 ml) and the layers were separated. The aqueous layer was extracted with dichloromethane (2 × 50 ml), the combined organic layers were washed with brine (50 ml),TwoSOFourDried on top. The solid was filtered off, the filtrate was concentrated in vacuo and the residue obtained was purified by column chromatography (75% EtOAc, 25% heptane on silica gel) to give the title compound (2.44 g, 88%). Obtained.
1H NMR (400 MHz, CDClThree): δ 1.14 (d, J = 6.4,6H), 1.38 (t, J = 7.1 Hz, 3H), 3.29 (s, 3H), 3.71 (s, 2H), 4.01 (q, J = 7.1 Hz, 2H), 4.70 (s, 1H), 6.90 (d, J = 8.8 Hz, 2H), 7.00 (dd, J = 2.5, 9.2 Hz, 1H), 7.22 (d, J = 8.8 Hz, 2H), 8.13 ( d, J = 9.2 Hz, 1H), 8.61 (d, J = 2.5 Hz, 1H). MS (ESI) (M + H)+= 415.
[0223]
50B: N- [2-amino-5- [methyl [[isopropylamino] carbonyl] amino] phenyl] -4-ethoxybenzeneacetamide
N- [5- [methyl [[isopropylamino] carbonyl] amino] -2-nitrophenyl] -4-ethoxybenzeneacetamide (190 mg, 0.46 mmol) and 10% Pd / C in EtOAc (5.0 ml). The mixture was hydrogenated at 30 psi for 4 hours. The contents were filtered through celite and the celite was washed with EtOAc (2 × 10.0 ml). The solvent was removed under vacuum and the resulting title compound (170 mg, 99%) was used without further purification.
1H-NMR (400 MHz, CDClThree): δ0.98 (d, J = 6.5 Hz, 6H), 1.38 (t, J = 7.1 Hz, 3H), 3.09 (s, 3H), 3.69 (s, 2H), 3.86 (spt, J = 6.7Hz) , 1H), 3.99 (q, J = 7.0 Hz, 2H), 4.11-4.13 (m, 1H), 6.71 (d, J = 8.4 Hz, 1H), 6.82 (dd, J = 2.4 Hz, J = 8.4 Hz , 1H), 6.87 (d, J = 8.6 Hz, 2H), 6.96 (d, J = 2.3 Hz, 1H), 7.24 (d, J = 8.6 Hz, 2H), 7.58 (s, 1H). MS (ESI) (M + H)+= 385.
[0224]
50C: N- [2- (4-ethoxybenzyl) -1-[(2S) -2-pyrrolidinylmethyl] -1H-benzimidazol-5-yl] -N ', N- (1-isopropyl) urea
N- [2-Amino-5- [methyl [[isopropylamino] carbonyl] amino] phenyl] in a mixture of 1,2-dichloroethane / AcOH (2: 1, 7.5 ml) according to the procedure of Example 40E. A mixture of -4-ethoxybenzeneacetamide (83 mg, 0.22 mmol) and 2- (S) -N-Boc-prolinal (56 μL, 0.30 mmol) was stirred at room temperature for 2.5 hours. BHThreePyridine complex (43 μl, 0.42 mmol) was added via syringe and the contents were stirred for 16 hours. The mixture was heated at reflux for 6 hours. The residue obtained by the usual post-treatment was purified by reversed-phase high-performance liquid chromatography (HPLC, C-18 column) to obtain the title compound as a trifluoroacetic acid (TFA) salt (25 mg, 26%).
1H-NMR (400MHz, MeOH-dFour): δ1.08 (d, J = 6.6 Hz, 6H), 1.36 (t, J = 6.9 Hz, 3H), 1.75-1.85 (m, 1H), 1.96-2.05 (m, 1H), 2.10-2.20 ( m, 2H), 3.26 (s, 3H), 3.44 (m, 1H), 3.85-3.93 (m, 2H), 4.01 (q, J = 7.1 Hz, 2H), 4.47 (s, 2H), 4.70 (d , J = 7.2 Hz, 2H), 6.93 (d, J = 8.6 Hz, 2H), 7.24 (d, J = 8.6 Hz, 2H), 7.38 (dd, J = 2.0, J = 8.8 Hz, 1H), 7.57 (d, J = 2.0 Hz), 7.77 (d, J = 8.6 Hz). MS (ESI) (M + H)+= 450.
[0225]
Example 51
1- (cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -N-methyl-1H-benzimidazol-5-amine
Method A:
51AA: 1- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -N-methyl-1H-benzimidazol-5-amine
To a suspension of methyl [1- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -1H-benzimidazol-5-yl] carbamate (0.781 g, 2.06 mmol) in THF At 0 ° C. LAH (0.32 g, 8.43 mmol) was added. The mixture was stirred at 0 ° C. for 1 hour and at reflux for 2.5 hours, cooled to −78 ° C., MeOH (5 ml) and H 2TwoQuenched with O (5 ml). NaTwoSOFour(10 g) was added and the resulting mixture was stirred at room temperature for 1 hour. After filtration and concentration, the residue was purified by MPLC on silica gel using EtOAc to give 641.7 mg (93%) of the title compound as an off-white solid.
1H-NMR (CDClThree): δ0.22 (m, 2H), 0.48 (m, 2H), 1.26 (m, 1H), 1.38 (t, J = 7.0 Hz, 3H), 2.89 (s, 3H), 3.83 (d, J = 6.6 Hz, 2H), 3.98 (q, J = 7.0 Hz, 2H), 4.23 (s, 2H), 6.64 (dd, J = 8.6, 2.2 Hz, 1H), 6.80 (d, J = 8.6 Hz, 2H) , 6.99 (d, J = 2.1 Hz, 1 H), 7.13 (m, 3H). MS (ESI) (M + H)+= 336.42.
[0226]
51AB: 1,1-Dimethylethyl [1- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -1H-benzimidazol-5-yl] methylcarbamate
1- (Cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -N-methyl-1H-benzimidazol-5-amine (816.9 mg, 2.44 mmol) in THF (60 ml) and BocTwoA solution of O (930.1 mg, 4.26 mmol) was stirred at room temperature over the weekend. After evaporation of the solvent, the residue was purified by MPLC using hexane / EtOAc (1: 1) on silica gel to give 917.7 mg (87%) of the title compound as a white solid. MS (ESI) (M + H)+= 436.49
[0227]
51AC: 1,1-Dimethylethyl [1- (cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -1H-benzimidazol-5-yl] methylcarbamate
1,1-Dimethylethyl [1- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -1H-benzimidazol-5-yl] methylcarbamate in THF (654.3 mg, 1.50 mmol) KHMDS (0.5 M, 4 ml, 2.0 mmol) was added to the solution at -78 ° C. After stirring for 40 minutes, MeI (283.9 mg, 2.0 mmol) was added. The mixture was stirred at room temperature overnight, MeOH (0.5 ml) and sat.Three(10 ml). The two layers were separated and the aqueous layer was extracted with EtOAc (3 × 30 ml). The combined organic layers were washed with brine (2 × 30 ml),TwoSOFourDried on top. After concentration, the residue was purified by MPLC using hexane / EtOAc (1: 1) on silica gel to give 541.3 mg (80%) of the desired compound as a yellow syrup. MS (ESI) (M + H)+= 450.44.
[0228]
51AD: 1- (cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -N-methyl-1H-benzimidazol-5-amine
1,1-Dimethylethyl [1- (cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -1H-benzimidazol-5-yl] methylcarbamate (541) in 4N HCl / dioxane (20 ml) (0.3 mg, 1.20 mmol) was stirred at room temperature for 2.5 hours. The solvent was evaporated and the residue was dissolved in water (30ml), neutralized with 2N NaOH and extracted with EtOAc (4x30ml). The combined organic layers were washed with saturated NaHCOThreeAnd washed with NaTwoSOFourDried on top. After filtration and concentration, 523.0 mg (100%) of the title compound was obtained as a syrup. MS (ESI) (M + H)+= 350.35.
[0229]
Method B:
51BA: ethyl 4-ethoxyphenyl-2-propionate
To a solution of 4-hydroxyphenyl-2-propionic acid (5.82 mg, 35.1 mmol) in DMF (100 m) at 0 ° C. with KTwoCOThree(12.12 g, 87.7 mmol) was added. After stirring for 1 hour, EtI (7.0 ml, 13.68 g, 87.7 mmol) was added. The mixture was stirred at room temperature over the weekend, diluted with water (400 ml) and extracted with EtOAc (4 × 100 ml). The combined organic layers were washed with water (2 × 100 ml) and brine (100 ml),TwoSOFourDried on top. After filtration and concentration, the residue was purified by MPLC using hexane / EtOAc (4: 1) on silica gel to give 7.61 g (98%) of the desired compound as a colorless liquid.
1H NMR (400 MHz, CDClThree): δ 1.18 (t, J = 7.2 Hz, 3H), 1.38 (t, J = 7.0 Hz, 3H), 1.44 (d, J = 7.0 Hz, 3H), 3.62 (q, J = 7.0 Hz, 2H) ), 3.99 (q, J = 7.1 Hz, 2H), 4.1 (m, 1H), 6.8 (m, 2H), 7.2 (m, 2H).
[0230]
51BB: 4-ethoxyphenyl-2-propionic acid
THF-HTwoTo a solution of ethyl 4-ethoxyphenyl-2-propionate in 30 ml of O (7: 3) was added LiOH (0.29 g, 12.0 mmol). The mixture was heated at 40 ° C. for 24 hours and diluted with water (20 ml). The aqueous layer was extracted with ether, acidified with 2N HCl, and then extracted with ether (4 × 20 ml). The combined organic layers were washed with brine, NaTwoSOFourDried on top. After filtration and concentration, 1.14 g (98%) of the title compound was obtained as a white solid.
1H NMR (400 MHz, CDClThree): δ 1.38 (t, J = 7.0 Hz, 3H), 1.47 (d, J = 7.2 Hz, 3 H), 3.66 (q, J = 7.2 Hz, 1H), 3.99 (q, J = 7.0 Hz, 2H), 6.8 (m, 2H), 7.2 (m, 2H).
[0231]
51BC: N- [1- (cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -1H-benzimidazol-5-yl] acetamide
N- [3-Amino-4-[(cyclopropylmethyl) amino] phenyl] acetamide (1.28 g, 5.82 mmol) and 4-ethoxyphenyl-2-propionic acid (1.13 g) in DMF (40 ml) (5.82 mmol) at room temperature was added DIPEA (1.52 mL, 1.13 g, 8.73 mmol). After stirring for 10 minutes, HATU (2.66 g, 6.98 mmol) was added in one portion. The mixture was stirred at room temperature overnight, then concentrated to a small volume (10 ml),TwoO (100 ml) was added and this was extracted with ethyl acetate (4 × 50 mL). After filtration and evaporation, the residue was dissolved in acetic acid (40 ml) and then heated at 100 ° C. for 20 hours. After removing the solvent, the residue was dissolved in EtOAc (200 ml) and 10% NaTwoSOFourAnd washed with NaTwoSOFourDried on top. After concentration, the crude product was purified by MPLC using EtOAc to give 2.14 g (97%) of the title compound as a light yellow solid.
1H-NMR (400MHz, CDClThree): d 0.11 (m, 1H), 0.27 (m, 1H), 0.47 (m, 2H), 0.94 (m, 1H), 1.38 (t, J = 7.0 Hz, 3H), 1.81 (d, J = 7.0 Hz, 3H), 2.21 (s, 3H), 3.76 (dd, J = 15.0,6.8 Hz, 1H), 3.86 (dd, J = 15.0, 6.5 Hz, 1H), 3.97 (q, J = 6.8Hz, 2H ), 4.28 (q, J = 7.0 Hz, 1H), 6.79 (d, J = 8.6 Hz, 2H), 7.10 (d, J = 8.6 Hz, 2H), 7.23 (d, J = 8.6 Hz, 1H) , 7.43 (s, 1H), 7.53 (dd, J = 8.6, 1.9 Hz, 1H), 7.78 (d, J = 2.0 Hz, 1H). MS (ESI) (M + H)+= 378.38.
[0232]
51BD: N- [1- (cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -1H-benzimidazol-5-yl] -N-methylacetamide
N- [1- (cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -1H-benzimidazol-5-yl] acetamide (2.13 g, 5.64 mmol) in THF (100 ml) NaH (0.45 g, 11.28 mmol) at 0 ° C. After stirring for 2 hours, iodomethane (1.60 g, 11.28 mmol) was added at room temperature. The mixture was stirred overnight, quenched with MeOH (2 ml), diluted with ether (200 ml), washed with a saturated solution of ammonium chloride (100 ml),TwoSOFourDried on top. After filtration and evaporation, the title compound (2.43 g, 100%) was obtained as a crude product. MS (ESI) (M + H)+= 392.40.
[0233]
51BE: 1- (cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -N-methyl-1H-benzimidazol-5-amine
N- [1- (Cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -1H-benzimidazol-5-yl] -N-methylacetamide in EtOH (2.43 g, 5.64) (Mmol) and 40% KOH (50 ml) was heated under reflux for 20 hours. After cooling, the mixture was concentrated to a small volume (50 ml),TwoDiluted with O (50 ml) and extracted with dichloromethane (4 × 50 ml). The combined organic layers areTwoSOFourDried on top. After filtration and evaporation of the solvent, the residue was purified by MPLC using EtOAc on silica gel to give 1.93 g (99%) of the title compound as an off-white solid. MS (ESI) (M + H)+= 350.37.
[0234]
Example 52
N- [1- (cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -1H-benzimidazol-5-yl] -N, 3-dimethylbutanamide
1- (Cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -N-methyl-1H-benzimidazol-5-amine (349.5 mg, 1.0 mmol) in MeCN (25 ml). To a solution of was added DIPEA (258.5 mg, 2.0 mmol), DMAP (10 mg) and isovaleryl chloride (180.9 mg, 1.5 mmol) at 0 ° C. The reaction mixture was stirred at room temperature overnight,TwoQuenched with O (150 ml) and extracted with EtOAc (4 × 50 ml). The combined organic layers were washed with brine, NaTwoSOFourDried on top. After filtration and evaporation of the solvent, the residue was purified by MPLC using EtOAc on silica gel to give 431.9 mg (99%) of the desired product as a colorless syrup as TFA as a white solid Converted to salt.
1H NMR (400 MHz, CDThreeOD): δ0.22 (m, 1H), 0.45 (m, 2H), 0.57 (m, 1H), 0.86 (d, J = 5.9 Hz, 6H), 1.02 (m, 1H), 1.38 (t, J = 7.0 Hz, 3H), 1.83 (d, J = 7.0 Hz, 3H), 2.06 (m, 2H), 2.10 (m, 1H), 3.34 (s, 3H), 4.02 (m, 3H), 4.21 (dd , J = 15.0, 6.6 Hz, 1H), 4.65 (q, J = 7.0 Hz, 1H), 6.90 (d, J = 8.6 Hz, 2H), 7.21 (d, J = 8.6 Hz, 2H), 7.28 (d , J = 8.4 Hz, 1H), 7.62 (s, 1H), 7.72 (d, J = 8.6 Hz, 1H). MS (ESI) (M + H)+= 434.42 (M + 1)+.
Analytical value (C27H35NThreeOTwo+0.80 TFA + 0.90 MeOH):
Calculated: C, 64.00; H, 7.17; N, 7.54.
Found: C, 63.98; H, 7.02; N, 7.34.
[0235]
Examples 53, 54 and 55
(Rac) -N- [1- (cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -1H-benzimidazol-5-yl] -N-methyl-N '-(1-methyl Ethyl) urea, (-)-N- [1- (cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -1H-benzimidazol-5-yl] -N-methyl-N'- (1-methylethyl) urea and (+)-N- [1- (cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -1H-benzimidazol-5-yl] -N-methyl -N '-(1-methylethyl) urea
1- (Cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -N-methyl-1H-benzimidazol-5-amine (523.0 mg, 1,2-dichloroethane (25 ml)) Isopropyl isocyanate (1.02 g, 12 mmol) at room temperature. The mixture was heated at 60 ° C. for 14 hours. After concentration, the residue was purified by MPLC using EtOAc on silica gel and 477.9 mg (92%) of the desired product (racemic), obtained as a light yellow solid, was converted to a TFA salt as a white solid. .
1H-NMR (400 MHz, CDThreeOD): δ0.27 (m, 1H), 0.51 (m, 2H), 0.60 (m, 1H), 1.08 (m, 1H), 1.15 (d, J = 6.4 Hz, 6 H), 1.39 (t, J = 7.0 Hz, 3H), 1.90 (d, J = 7.1 Hz, 3H), 3.35 (s, 3H), 3.97 (sep, J = 6.7 Hz, 1H), 4.04 (q, J = 7.0 Hz, 2H) , 4.26 (dd, J = 14.8, 7.0 Hz, 1H), 4.38 (dd, J = 15.0, 7.2 Hz, 1H), 4.89 (q, J = 7.0 Hz, 1H), 6.97 (d, J = 8.8 Hz, 2H), 7.26 (d, J = 8.6 Hz, 2H), 7.52 (dd, J = 8.6, 1.8 Hz, 1H), 7.71 (s, 1H), 7.91 (d, J = 9.0 Hz, 1H). MS (ESI) (M + H)+= 435.44 (M + 1)+.
Analytical value (C26H34NFourOTwo+1.20 TFA + 0.10 HTwoO):
Calculated: C, 59.51; H, 6.22; N, 9.77.
Found: C, 59.64; H, 6.22; N, 9.53.
[0236]
Racemic mixture (rac) -N- [1- (cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -1H-benzimidazol-5-yl] -N-methyl-N '-(1 -Methylethyl) urea was separated by an AD chiral column using hexane / iPrOH (9: 1).
[0237]
Enantiomer: (-)-N- [1- (cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -1H-benzimidazol-5-yl] -N-methyl-N '-(1 -Methylethyl) urea: 221.2 mg (40%), TFA salt, white solid, [α]D-11.7 ° (c 0.25, EtOH).
1H-NMR (400 MHz, CDThreeOD): δ0.27 (m, 1H), 0.51 (m, 2H), 0.60 (m, 1H), 1.08 (m, 1H), 1.15 (d, J = 6.4 Hz, 6 H), 1.39 (t, J = 7.0 Hz, 3H), 1.90 (d, J = 7.1 Hz, 3H), 3.35 (s, 3H), 3.97 (sep, J = 6.7 Hz, 1H), 4.04 (q, J = 7.0 Hz, 2H) , 4.26 (dd, J = 14.8, 7.0 Hz, 1H), 4.38 (dd, J = 15.0, 7.2 Hz, 1H), 4.89 (q, J = 7.0 Hz, 1H), 6.97 (d, J = 8.8 Hz, 2H), 7.26 (d, J = 8.6 Hz, 2H), 7.52 (dd, J = 8.6, 1.8 Hz, 1H), 7.71 (s, 1H), 7.91 (d, J = 9.0 Hz, 1H). MS (ESI) (M + H)+= 435.44 (M + 1)+.
Analytical value (C26H34NFourOTwo+1.20 TFA + 0.10 HTwoO):
Calculated: C, 59.51; H, 6.22; N, 9.77.
Found: C, 59.64; H, 6.22; N, 9.53.
[0238]
Enantiomer: (+)-N- [1- (cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -1H-benzimidazol-5-yl] -N-methyl-N ′-(1 -Methylethyl) urea: 186.4 mg (34%), TFA salt, white solid, [α]D+12.2 [deg.] (C 0.27, EtOH).
1H NMR (400 MHz, CDThreeOD): δ 0.27 (m, 1H), 0.51 (m, 2H), 0.60 (m, 1H), 1.08 (m, 1H), 1.15 (dd, J = 6.6, 1.6 Hz, 6 H), 1.39 (t , J = 7.0 Hz, 3H), 1.90 (d, J = 7.2 Hz, 3H), 3.35 (s, 3H), 3.97 (sep, J = 6.6 Hz, 1H), 4.04 (q, J = 7.0 Hz, 2H ), 4.26 (dd, J = 15.0, 7.2 Hz, 1H), 4.39 (dd, J = 15.0, 6.8 Hz, 1H), 4.90 (q, J = 7.2 Hz, 1H), 6.97 (m, 2H), 7.26 (m, 2H), 7.51 (dd, J = 9.0, 2.0 Hz, 1H), 7.71 (d, J = 1.8, 1H), 7.91 (d, J = 9.0 Hz, 1H). MS (ESI) (M + H)+= 435.46 (M + 1)+.
Analytical value (C26H34NFourOTwo+1.10 TFA + 0.20 HTwoO):
Calculated: C, 60.10; H, 6.35; N, 9.94.
Found: C, 60.02; H, 6.28; N, 10.07.
[0239]
Example 56
N- [1- (cyclohexylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -1H-benzimidazol-5-yl] -N-methyl-N '-(1-methylethyl) -urea
56A: [4-[(cyclohexylmethyl) amino] -3-nitrophenyl] -methyl ester carbamic acid
To a stirred mixture of methyl 4-fluoro-3-nitrophenylcarbamate (3 g, 14 mmol) in 4: 1 ethanol: water (40 ml + 10 ml) at room temperature was added cyclohexylmethylamine (3.6 ml, 28 mmol). The reaction mixture was heated at 60 ° C. overnight and cooled to room temperature. Water (20 ml) was added to the mixture and a deep orange solid precipitated out of solution and was collected as the desired product (6 g, 100%). MS (ESI) (M + H)+: 308.32 (M + 1)+
[0240]
56B: [3-Amino-4-[(cyclohexylmethyl) amino] phenyl] -methyl ester carbamic acid
[4-[(Cyclohexylmethyl) amino] -3-nitrophenyl] -methyl ester carbamic acid was hydrogenated in ethyl acetate catalyzed by 10% Pd / C at 30-40 psi for 6 hours. The reaction mixture was filtered through celite and the solvent was removed to give the desired product as a dark purple solid (2.02 g, 37%). MS (ESI) (M + H)+: 278.30 (M + 1)
[0241]
56C: [1- (cyclohexylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -1H-benzimidazol-5-yl] -methyl ester carbamic acid
[3-Amino-4-[(cyclohexylmethyl) amino] phenyl] -methyl ester carbamic acid (2.02 g, 7.3 mmol), 4-ethoxy-α-methylbenzeneacetic acid (1 in dry DMF (24 ml)) To a stirred solution of 0.4 g (7.3 mmol) and diisopropylethylamine (2.2 ml, 12.4 mmol) was added HATU) (3.1 g, 8.1 mmol) in one portion at room temperature. CH solutionTwoClTwoAnd water and extracted (3 × 30 ml). The combined organic layers were washed with brine (30 ml),TwoSOFourDry over, filter and concentrate. The residue was dissolved in acetic acid (180 ml) and heated to 80 ° C. overnight. The solvent was evaporated and the residue was dissolved in ethyl acetate (200ml), washed with 2N NaOH, brine, NaTwoSOFourDried on top. The mixture was filtered and concentrated to give the title compound as a yellow foam (2.44 g, 77%). MS (ESI) (M + H)+= 436.42 (M + 1)+.
[0242]
56D: 1- (cyclohexylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -N-methyl-1H-benzimidazol-5-amine
EtTwo[1- (Cyclohexylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -1H-benzimidazole-5 in O-MeOH (100 ml, only enough MeOH to dissolve the compound). Yl] -methylestercarbamic acid (2.44 g, 5.6 mmol) in Et.TwoA 1 M solution of HCl in O was added dropwise until no precipitate formed (6 ml). The solvent was removed under vacuum. HCl salt to EtTwoDissolve in O (120 ml) and THF (60 ml), cool the mixture to 0 ° C. and add LiAlHFour(986 mg, 25.2 mmol) was added in one portion. The solution was slowly warmed to room temperature and stirred overnight, then cooled to -78 C, quenched with MeOH (12 ml) and water (12 ml), warmed to room temperature,TwoSOFour(25 g) was added and stirred at room temperature for 3 hours. Filtration through celite, washing with ethyl acetate and concentration gave the title compound as a brown foam (2.1 g, 96%). MS (ESI) (M + H)+= 392.46 (M + 1)+
[0243]
56E: N- [1- (cyclohexylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -1H-benzimidazol-5-yl] -N-methyl-N '-(1-methylethyl)- urea
1- (cyclohexylmethyl) -2- [1- (4-ethoxyphenyl) ethyl] -N-methyl-1H-benzimidazol-5-amine (1,2 g, 5,2) in 1,2-dichloroethane (270 ml). (4 mmol) at room temperature was added isopropyl isocyanate (1.1 ml, 10.8 mmol) and the reaction mixture was heated at 60 ° C. overnight. The solution was cooled to room temperature, the solvent was evaporated and the brown residue was purified by MPLC (ethyl acetate on silica gel) to give the title compound as a beige foam (1.5 g, 58%).
1H NMR (400 MHz, CDThreeOD) δ 0.95-1.18 (m, 11H), 1.36 (t, J = 7.0 Hz, 3H), 1.41-1.68 (m, 6H), 1.82 (d, J = 7.0 Hz, 2H), 3.31 (s, 3H), 3.89-3.95 (m, 1H), 4.01 (apq, J = 7.0.Hz, 2H), 4.13-4.18 (m, 1H), 4.68 (q, J = 7.2 Hz, 1H), 7.17-7.20 ( m, 2H), 7.35 (dd, J = 2.0, 8.8 Hz, 1H), 7.63 (d, J = 2.0 Hz, 1H), 7.71 (d, J = 8.8 Hz, 1H). MS (ESI) (M + H)+= 477.48 (M + 1)+.
Analytical value (C29H40NFourOTwo+ 0.5 HC1 + 0.8 CHThreeOH):
Calculated: C, 68.76; H, 8.46; N, 10.26.
Found: C, 68.75; H, 8.61; N, 10.98.
[0244]
Example 57
2-[(4-ethoxyphenyl) methyl] -N, N-diethyl-3-[(5-nitro-2-thienyl) methyl] -3H-imidazo [4,5-b] pyridine-6-carboxamide 57A: N, N-diethyl-5-nitro-6- (2-propenylamino) -3-pyridinecarboxamide
To a solution of 6-chloro-5-nitro-3-pyridinecarboxylic acid (4.72 g, 23.30 mmol) in methanol (70 ml) at room temperature was added allylamine (5.25 ml, 70.0 mmol) and the mixture was added. Was stirred overnight. Then the reaction mixture was concentrated under vacuum and the residue was dissolved in water (100 ml). The solution is brought to pH 3 by adding 1 M aqueous HCl. The resulting suspension was extracted with EtOAc (50ml). The aqueous layer was back-extracted with more EtOAc (2 × 50 ml). Combine the organic layers and add MgSOFourDry over and filter. The solution was concentrated in vacuo and the resulting 5-nitro-6- (2-propenylamino) -3-pyridinecarboxylic acid was used without further purification.
[0245]
This residue was dissolved in diethylamine (100 ml). HATU (9.30 g, 24.47 mmol) was added to the solution. The mixture was stirred at room temperature for 48 hours. The reaction mixture is then concentrated in vacuo and the residue is washed with NaHCOThreeDissolved in saturated aqueous solution (100 ml) and EtOAc (100 ml). The layers were separated and the aqueous layer was back-extracted with more EtOAc (2 × 50 ml). Combine the organic layers and add MgSOFourDry over, filter and concentrate under vacuum. The residue is purified by flash chromatography on silica gel (CHTwoClTwoMedium [2% MeOH + 1% NHFourOH aqueous solution]) to give the title compound, N, N-diethyl-5-nitro-6- (2-propenylamino) -3-pyridinecarboxamide (4.83 g, 6-chloro-5-nitro-3-pyridinecarboxylic acid). (74.5% yield) from the acid.
1H-NMR (400 MHz, CDClThree): δ1.26 (m, 6H), 3.28 (br s, 1H), 3.47 (m, 4H), 4.26 (m, 2H), 5.22 (m, 1H), 5.30 (m, 1H), 7.40 (d , J = 8.2 Hz, 1H), 7.70 (d, J = 8.2 Hz, 1H). MS (ESI) (M + H)+: 279.
[0246]
57B: 5-amino-N, N-diethyl-6- (2-propenylamino) -3-pyridinecarboxamide
To a solution of N, N-diethyl-5-nitro-6- (2-propenylamino) -3-pyridinecarboxamide (4.83 g, 17.25 mmol) in DMF (50 ml) at room temperature was added tin dichloride dihydrate. The hydrate (8.56 g, 37.95 mmol) was added. The mixture was stirred at 80 ° C. overnight. The reaction mixture was brought to room temperature and concentrated under vacuum. NaHCOThreeDissolved in saturated aqueous solution (100 ml) and EtOAc (100 ml). The suspension was filtered and the layers were separated. The aqueous layer was back-extracted with more EtOAc (100 ml). Combine the organic layers and add MgSOFourDry over, filter and concentrate under vacuum. The residue is purified by flash chromatography on silica gel (CHTwoClTwoMedium [5% MeOH + 1% NHFourOH aqueous solution]) to give 2.10 g of the title compound, 5-amino-N, N-diethyl-6- (2-propenylamino) -3-pyridinecarboxamide (N, N-diethyl-5-nitro-6 (29.0% yield from (2-propenylamino) -3-pyridinecarboxamide).
1H-NMR (400 MHz, CDClThree): δ 1.20 (t, J = 7.2 Hz, 6H), 3.23 (br s, 1H), 3.45 (m, 4H), 4.12 (m, 2H), 4.44 (br s, 2H), 5.17 (d, J = 12.5 Hz, 1H), 5.26 (d, J = 17.2 Hz, 1H), 6.04 (m, 1H), 7.00 (d, J = 2.0 Hz, 1H), 7.83 (d, J = 2.0 Hz, 1H) . MS (ESI) (M + H)+: 2.49.
[0247]
57C: 5-[[(4-ethoxyphenyl) acetyl] amino] -N, N-diethyl-6- (2-propenylamino) -3-pyridinecarboxamide
To a solution of 5-amino-N, N-diethyl-6- (2-propenylamino) -3-pyridinecarboxamide (1.61 g, 6.50 mmol) in dichloromethane (50 ml) at 0 ° C was added 4-ethoxy-. Benzeneacetyl chloride (1.35 g, 6.80 mmol) was added. The mixture was stirred at room temperature for 3 hours. The reaction mixture is then washed with NaHCOThreeQuench with saturated aqueous solution (100 ml) and extract with dichloromethane (50 ml). The aqueous layer was further back-extracted with dichloromethane (2 × 50 ml). Combine the organic layers and add MgSOFourDry over, filter and concentrate under vacuum. The residue is purified by flash chromatography on silica gel (CHTwoClTwoMedium [2% MeOH + 0.5% NHFourOH aqueous solution]) and the title compound, 5-[[(4-ethoxyphenyl) acetyl] amino] -N, N-diethyl-6- (2-propenylamino) -3-pyridinecarboxamide, 1.69 g (5. -Amino-N, N-diethyl-6- (2-propenylamino) -3-pyridinecarboxamide (63.3%).
1H-NMR (400 MHz, CDClThree): δ 1.18 (t, J = 7.2 Hz, 6H), 1.41 (t, J = 7.8 Hz, 3H), 3.42 (br s, 1H), 3.69 (s, 2H), 4.02 (m, 8H), 5.13 (m, 2H), 5.92 (m, 1H), 6.90 (m, 2H), 7.27 (m, 2H), 7.34 (m, 1H), 8.00 (m, 1H). MS (ESI) (M + H)+: 411.
[0248]
57D: 6-amino-5-[[(4-ethoxyphenyl) acetyl] amino] -N, N-diethyl-3-pyridinecarboxamide
5-[[(4-Ethoxyphenyl) acetyl] amino] -N, N-diethyl-6- (2-propenylamino) -3-pyridinecarboxamide (1.04 g, 2.53) in dichloromethane (20 ml) at room temperature To the degassed solution of (mmol), palladium tetrakis (117 mg, 0.10 mmol) was added, followed by acetic acid (580 μL, 10.14 mmol) and phenylsilane (625 μL, 5.07 mmol). The mixture was stirred for 6 hours. The reaction mixture is then washed with NaHCOThreeQuenched with saturated aqueous solution (50 ml) and extracted with EtOAc (20 ml). The aqueous layer was further back-extracted with dichloromethane (2 × 20 ml). Combine the organic layers and add MgSOFourDry over, filter and concentrate under vacuum. The residue is purified by flash chromatography on silica gel (CHTwoClTwoMedium [3% MeOH + 1% NHFourOH]) to give 705 mg of the title compound, 6-amino-5-[[(4-ethoxyphenyl) acetyl] amino] -N, N-diethyl-3-pyridinecarboxamide (5-[[(4-ethoxy Phenyl) acetyl] amino] -N, N-diethyl-6- (2-propenylamino) -3-pyridinecarboxamide (75.2%).
1H-NMR (400 MHz, CDClThree): δ 1.18 (br s, 6H), 1.43 (t, J = 7.0 Hz, 3H), 3.42 (br s, 4H), 3.69 (s, 2H), 4.04 (q, J = 7.0 Hz, 2H) , 4.73 (s, 2H), 6.91 (d, J = 8.6 Hz, 2H), 7.26 (d, J = 8.6 Hz, 2H), 7.38 (m, 1H), 7.78 (s, 1H), 7.95 (m, 1H). MS (ESI) (M + H)+: 372.
[0249]
57E: 2-[(4-ethoxyphenyl) methyl] -N, N-diethyl-3-[(5-nitro-2-thienyl) methyl] -3H-imidazo [4,5-b] pyridine-6-carboxamide
6-Amino-5-[[(4-ethoxyphenyl) acetyl] amino] -N, N-diethyl-3-pyridinecarboxamide (30 mg, 0.5 ml) in dichloroethane (0.5 ml) and acetic acid (0.5 ml) at room temperature. 0.08 mmol) was added 5-nitro-2-thiophenecarboxaldehyde (19 mg, 0.12 mmol). The mixture was stirred for 4.5 hours. BHThree-Pyridine (8.2 μL, 0.08 mmol) was added and the reaction mixture was brought to 84 ° C. After stirring overnight, the mixture was cooled to room temperature and 5-nitro-2-thiophenecarboxaldehyde (19 mg, 0.12 mmol) was added. The mixture was stirred for 5 hours. BHThree-Pyridine (8.2 μL, 0.08 mmol) was added and the reaction mixture was brought to 84 ° C. After stirring overnight, the reaction was quenched by adding 1 M aqueous NaOH (20 ml) and extracted with EtOAc (20 ml). The aqueous layer was further back-extracted with dichloromethane (2 × 20 ml). Combine the organic layers and add MgSOFourDry over, filter and concentrate under vacuum. The residue is purified by flash chromatography on silica gel (CHTwoClTwoMedium [3% MeOH + 0.5% NHFourOH]] to give the title compound, 2-[(4-ethoxyphenyl) methyl] -N, N-diethyl-3-[(5-nitro-2-thienyl) methyl] -3H-imidazo [4, 5-b] pyridine-6-carboxamide (purity:> 84% at 215 nm,> 81% at 254 nm,> 68% at 280 nm).
1H-NMR (400 MHz, CDClThree): δ1.23 (m, 6H), 1.40 (t, J = 6.8 Hz, 3H), 3.36 (br s, 2H), 3.60 (br s, 2H), 3.98 (q, J = 6.8 Hz, 2H) , 4.29 (s, 2H), 4.84 (s, 2H), 6.80 (d, J = 8.6 Hz, 2H), 7.07 (d, J = 8.6 Hz, 2H), 7.66 (d, J = 4.1 Hz, 1H) , 7.77 (d, J = 4.1 Hz, 1H), 8.03 (d, J = 2.0 Hz, 1H), 8.03 (d, J = 2.0 Hz, 1H). MS (ESI) (M + H)+: 494.
[0250]
Example 58
3- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -N-methyl-3H-imidazo [4,5-b] pyridin-6-amine
58A: N- (cyclopropylmethyl) -3,5-dinitro-2-pyridineamine
To a solution of 2-chloro-3,5-dinitro-pyridine (1.00, 4.91 mmol) in dichloromethane (10 ml) maintained at room temperature in a water bath was added cyclopropylmethylamine (852 μL, 9.83 mmol). Was added dropwise. Immediately after the addition, orange coloring was observed, and a precipitate was detected. The mixture was stirred for 1 hour. The reaction was quenched with 1 M aqueous NaOH (10 ml) and extracted with EtOAc (20 ml). The organic layer is washed with brine, MgSOFourDry over, filter and concentrate under vacuum. The procedure yielded 1.117 g (96% from 2-chloro-3,5-dinitro-pyridine) of the title compound, N- (cyclopropylmethyl) -3,5-dinitro-2-pyridinamine, purity determined by HPLC. It was> 96%. The residue was used without further purification.
1H-NMR (400 MHz, CDClThree): δ0.36 (m, 2H), 0.66 (m, 2H), 1.18 (m, 1H), 3.61 (dd, J = 5.3, 7.2 Hz, 2H), 8.85 (m, 1H), 9.23 (m, 2H). MS (ESI) (M + H)+: 239.
[0251]
58B: NTwo-(Cyclopropylmethyl) -5-nitro-2,3-pyridinediamine
To a solution of N- (cyclopropylmethyl) -3,5-dinitro-2-pyridinamine (1.17 g, 4.92 mmol) in EtOAc (50 ml) at room temperature was added Pd / C (394 mg, 0.25 mmol, 10% grade). The mixture was placed in a Parr apparatus under 35 psi hydrogen pressure. The mixture was shaken overnight. The reaction mixture was filtered over celite and concentrated under vacuum. The residue is purified by flash chromatography on silica gel (CHTwoClTwoMedium [2.5% MeOH + 1% NHFourOH]] to give the title compound, NTwo792 mg (77.3% from N- (cyclopropylmethyl) -3,5-dinitro-2-pyridineamine) of-(cyclopropylmethyl) -5-nitro-2,3-pyridinediamine were obtained.
1H-NMR (400 MHz, CDClThree): δ0.31 (m, 2H), 0.61 (m, 2H), 1.14 (m, 1H), 3.34 (br s, 2H), 3.42 (dd, J = 5.3, 7.2 Hz, 2H), 5.15 (br s, 1H), 7.62 (d, J = 2.5 Hz, 1H), 8.73 (d, J = 2.5 Hz, 2H). MS (ESI) (M + H)+: 209.
[0252]
58C: 3- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -6-nitro-3H-imidazo [4,5-b] pyridine
N in dichloromethane (50 mL) at room temperatureTwoTo a solution of-(cyclopropylmethyl) -5-nitro-2,3-pyridinediamine (792 mg, 3.80 mmol) was added 4-ethoxy-benzeneacetyl chloride (795 g, 4.00 mmol). The mixture was stirred for 10 hours. The mixture was concentrated under vacuum and the residue was dissolved in dichloroethane (25ml) and acetic acid (25ml). The mixture was stirred at 85 ° C. for 48 hours. The reaction mixture was then cooled to room temperature and brought to pH 10 by adding a 1 M aqueous NaOH solution. The mixture was extracted with EtOAc (50ml). The aqueous layer was back-extracted with more EtOAc (2 × 50 ml). Combine the organic layers and add MgSOFourDry over, filter and concentrate under vacuum. The residue is purified by flash chromatography on silica gel (CHTwoClTwoMedium [2.5% MeOH + 0.5% NHFourOH]), and the title compound, 3- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -6-nitro-3H-imidazo [4,5-b] pyridine, 1.02 g ( NTwo-(Cyclopropylmethyl) -5-nitro-2,3-pyridinediamine to give 76.0%).
1H-NMR (400 MHz, CDClThree): δ0.44 (m, 2H), 0.52 (m, 2H), 1.10 (m, 1H), 1.40 (t, J = 6.8 Hz, 3H), 4.01 (q, J = 6.8Hz, 2H), 4.10 (d, J = 7.2Hz, 2H), 4.35 (s, 2H), 6.86 (d, J = 8.8Hz, 2H), 7.18 (d, J = 8.8Hz, 2H), 8.80 (d, J = 2.3 Hz , 1H), 9.26 (d, J = 2.3 Hz, 1H). MS (ESI) (M + H)+: 353.
[0253]
58D: 3- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -3H-imidazo [4,5-b] pyridin-6-amine
3- (Cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -6-nitro-3H-imidazo [4,5-b] pyridine (1 ml) in EtOAc (20 ml) and acetic acid (1 ml) at room temperature. To a solution of .35 g (3.84 mmol) was added Pd / C (308 mg, 10% grade). The mixture was placed in a Parr apparatus under 35 psi hydrogen pressure. The mixture was shaken for 72 hours. The reaction mixture was filtered through celite. The filtrate was dissolved in 1 M aqueous NaOH (25 ml) and EtOAc (50 mL) and the layers were separated. The aqueous layer was back-extracted with more EtOAc (2 × 50 ml). Combine the organic layers and add MgSOFourDry over, filter and concentrate under vacuum. Depending on the process, the title compound 3- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -3H-imidazo [4,5-b] pyridin-6-amine 1.18 g (3- (cyclopropylmethyl) ) -2-[(4-Ethoxyphenyl) methyl] -6-nitro-3H-imidazo [4,5-b] pyridine) was obtained, with a purity> 95% according to HPLC analysis. there were. The residue was used without further purification.
1H-NMR (400 MHz, CDClThree): δ0.35 (m, 2H), 0.46 (m, 2H), 1.11 (m, 1H), 1.39 (t, J = 6.8 Hz, 3H), 3.26 (br s, 2H), 3.98 (m, 4H) ), 4.25 (s, 2H), 6.83 (d, J = 8.8 Hz, 2H), 7.16 (d, J = 8.8 Hz, 2H), 7.34 (d, J = 2.3 Hz, 1H), 7.87 (d, J = 2.3 Hz, 1H). MS (ESI) (M + H)+: 323.
[0254]
58E: [3- (Cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -3H-imidazo [4,5-b] pyridin-6-yl] -carbamic acid methyl ester
3- (Cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -3H-imidazo [4,5-b] pyridin-6-amine (1.18 g, 3 in dichloromethane (20 ml) at 0 ° C) To a solution of .36 mmol) was added Hunig's base (869 μL, 4.99 mmol) followed by methyl chloroformate (326 μL, 4.22 mmol). The mixture was brought to room temperature and stirred overnight. NHFourThe reaction was quenched with a saturated aqueous solution of Cl and extracted with dichloromethane (50 ml).
[0255]
The aqueous layer was further back-extracted with dichloromethane (2 × 50 ml). Combine the organic layers and add MgSOFourDry over, filter and concentrate under vacuum. The residue is purified by flash chromatography on silica gel (CHTwoClTwoMedium [3-7% MeOH + 1% NHFourOH]] to give the title compound, [3- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -3H-imidazo [4,5-b] pyridin-6-yl] -carbamine Acid methyl ester 1.02 g (73.3% yield from 3- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -3H-imidazo [4,5-b] pyridin-6-amine) Got.
1H-NMR (400 MHz, CDClThree): δ0.38 (m, 2H), 0.45 (m, 2H), 1.11 (m, 1H), 1.39 (t, J = 7.0 Hz, 3H), 3.81 (s, 3H), 4.00 (m, 4H) , 4.29 (s, 2H), 6.69 (br s, 1H), 6.84 (d, J = 8.6 Hz, 2H), 7.15 (d, J = 8.6 Hz, 2H), 8.13 (br s, 1H), 8.26 ( br s, 1H). MS (ESI) (M + H)+: 381.
[0256]
58F: 3- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -N-methyl-3H-imidazo [4,5-b] pyridin-6-amine
[3- (Cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -3H-imidazo [4,5-b] pyridin-6-yl] -carbamic acid methyl ester in dichloromethane (20 ml) at room temperature (550 mg, 1.46 mmol), a 1 M solution of hydrochloric acid in diethyl ether (3 ml) was added. The mixture was stirred for 10 minutes and concentrated under vacuum. The residue was dissolved in THF (15 ml) and B diethyl ether (30 ml) and cooled to 0 ° C. LAH (137 mg, 3.61 mmol) was added to the solution. The mixture was stirred overnight. The reaction mixture was then cooled to -78 C and quenched with MeOH (3.20 ml) and water (3.20 ml). NaTwoSOFourWas added to the mixture, which was slowly brought to room temperature. The mixture was filtered over celite and concentrated under vacuum. The residue is purified by flash chromatography on silica gel (CHTwoClTwoMedium [3.5% MeOH + 0.5% NHFourOH]] and the title compound, 445 mg of 3- (cyclopropylmethyl-2-[(4-ethoxyphenyl) methyl] -N-methyl-3H-imidazo [4,5-b] pyridin-6-amine. (90.6% yield from methyl [[3- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -3H-imidazo [4,5-b] pyridin-6-yl] -carbamate) ) Got.
1H-NMR (400 MHz, CDClThree): δ0.35 (m, 2H), 0.46 (m, 2H), 1.11 (m, 1H), 1.39 (t, J = 7.0 Hz, 3H), 2.90 (s, 3H), 3.98 (m, 4H) , 4.25 (s, 2H), 6.83 (d, J = 8.8 Hz, 2H), 7.15 (d, J = 8.8 Hz, 2H), 7.23 (d, J = 2.5 Hz, 1H), 7.83 (d, J = 2.5 Hz, 1H). MS (ESI) (M + H)+: 337.
[0257]
Example 59
N- [3- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -3H-imidazo [4,5-b] pyridin-6-yl] -N, 3-dimethylbutanamide
3- (Cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -N-methyl-3H-imidazo [4,5-b] pyridin-6-amine (143.1) in dichloroethane (17 ml) at room temperature. To a solution of 6 mg, 0.43 mmol) was added triethylamine (300 μL, 2.15 mmol) followed by isovaleryl chloride (156 μl, 1.28 mmol). The solution was stirred overnight. NaHCO reactionThreeQuenched with saturated aqueous solution (10 ml) and extracted with EtOAc (25 ml). The aqueous layer was back-extracted with more EtOAc (25 ml). Combine the organic layers and add MgSOFourDry over, filter and concentrate under vacuum. The residue was purified by preparative HPLC (C-18 column, 10-70% [0.1% TCN solution of AcCN in 0.1% aqueous TFA]) to give the title compound, N- [3- (cyclopropylmethyl). 95.5 g of TFA salt of 2-[(4-ethoxyphenyl) methyl] -3H-imidazo [4,5-b] pyridin-6-yl] -N, 3-dimethylbutanamide (3- (cyclopropylmethyl ) -2-[(4-Ethoxyphenyl) methyl] -N-methyl-3H-imidazo [4,5-b] pyridin-6-amine (41.5% yield).
1H-NMR (400 MHz, dThree-MeOD): δ0.45 (m, 4H), 0.82 (m, 6H), 1.17 (m, 1H), 1.36 (t, J = 7.0 Hz, 3H), 2.00 (m, 2H), 3.32 (s, 3H), 4.00 (t, J = 7.0 Hz, 2H), 4.22 (d, J = 7.2 Hz, 2H), 4.44 (s, 2H), 6.90 (d, J = 8.6 Hz, 2H), 7.23 (d, J = 8.6 Hz, 2H), 7.97 (d, J = 2.15 Hz, 1H), 8.33 (brs, 1H). MS (ESI) (M + H)+: 421.
[0258]
Example 60
N- [3- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -3H-imidazo [4,5-b] pyridin-6-yl] -N-methyl-N1-(1-methylethyl) -urea
3- (Cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -N-methyl-3H-imidazo [4,5-b] pyridin-6-amine (163.3) in DMF (20 ml) at room temperature. To a solution of 4 mg, 0.49 mmol) was added isopropyl isocyanate (48 μL, 0.49 mmol). The mixture was stirred at 50 ° C. for 72 hours. Starting material was present by HPLC analysis of the reaction mixture. Therefore, more isopropyl isocyanate (144 μL, 1.47 mmol) was added. The resulting mixture was stirred at 50 ° C. for 12 hours. The reaction mixture was then dissolved in water (150ml) and EtOAc (150ml). The aqueous layer was back-extracted with more EtOAc (100 ml). Combine the organic layers and add MgSOFourDry over, filter and concentrate under vacuum. The residue was purified by preparative HPLC (C-18 column, 10-70% [0.1% TCN solution of AcCN in 0.1% aqueous TFA]) to give the title compound, N- [3- (cyclopropylmethyl). -2-[(4-ethoxyphenyl) methyl] -3H-imidazo [4,5-b] pyridin-6-yl] -N-methyl-N192 mg of TFA salt of-(1-methylethyl) -urea (3- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -N-methyl-3H-imidazo [4,5-b] pyridine- 35.0% yield from 6-amine).
1H-NMR (400 MHz, dThree-MeOD): δ0.46 (m, 4H), 1.09 (d, J = 6.6 Hz, 6H), 1.18 (m, 1H), 1.36 (t, J = 7.0 Hz, 3H), 3.30 (s, 3H) , 3.92 (m, 1H), 4.00 (t, J = 7.0 Hz, 2H), 4.22 (d, J = 7.2 Hz, 2H), 4.44 (s, 2H), 6.90 (d, J = 8.6 Hz, 2H) , 7.22 (d, J = 8.6 Hz, 2H), 7.93 (d, J = 2.2 Hz, 1H), 8.34 (d, J = 2.2 Hz, 1H). MS (ESI) (M + H)+: 422.
[0259]
Example 61
N- [3- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -3H-imidazo [4,5-b] pyridin-6-yl] -N-methyl-benzenesulfonamide
3- (Cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -N-methyl-3H-imidazo [4,5-b] pyridin-6-amine (237.%) in acetonitrile (5 ml) at room temperature. To a solution of 0 mg, 0.70 mmol) was added triethylamine (196 μL, 1.41 mmol) followed by benzenesulfonyl chloride (156 μL, 0.92 mmol). The mixture was stirred overnight. The reaction mixture was concentrated under vacuum. The residue was taken up in EtOAc (10 ml) and NaTwoCOThreeDissolved in a saturated aqueous solution (10 ml). The layers were separated and the aqueous layer was back-extracted with EtOAc (10 ml). Combine the organic layers and add MgSOFourDry over, filter and concentrate under vacuum. The residue was purified by preparative HPLC (C-18 column, 20-80% [0.1% AcCN solution in AcOH] in 0.1% aqueous AcOH) to give the title compound, N- [3- (cyclopropylmethyl). 63 mg of the AcOH salt of 2-[(4-ethoxyphenyl) methyl] -3H-imidazo [4,5-b] pyridin-6-yl] -N-methyl-benzenesulfonamide (3- (cyclopropylmethyl)- 2-[(4-ethoxyphenyl) methyl] -N-methyl-3H-imidazo [4,5-b] pyridin-6-amine was obtained (17.0% yield).
1H-NMR (400 MHz, dThree-MeOD): δ0.37 (m, 2H), 0.42 (m, 2H), 1.10 (m, 1H), 1.35 (t, J = 7.0 Hz, 3H), 3.31 (s, 3H), 3.99 (t, J = 7.0 Hz, 2H), 4.10 (d, J = 7.2 Hz, 2H), 4.32 (s, 2H), 6.86 (d, J = 8.6Hz, 2H), 7.17 (d, J = 8.6Hz, 2H) , 7.55 (m, 2H), 7.57 (m, 2H), 7.59 (m, 1H), 7.70 (m, 1H), 8.11 (d, J = 2.2 Hz, 1H). MS (ESI) (M + H)+: 477.
[0260]
Example 62
N- [3- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -3H-imidazo [4,5-b] pyridin-6-yl] -N-methyl-thiophene sulfonamide
3- (Cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -N-methyl-3H-imidazo [4,5-b] pyridin-6-amine (250.%) in acetonitrile (5 ml) at room temperature. To a solution of 0 mg, 0.74 mmol) was added triethylamine (207 μL, 1.49 mmol) followed by 2-thiophenesulfonyl chloride (176 μL, 0.96 mmol). The mixture was stirred overnight. The reaction mixture was concentrated under vacuum. The residue was taken up in EtOAc (10 ml) and NaTwoCOThreeDissolved in a saturated aqueous solution (10 ml). The layers were separated and the aqueous layer was back-extracted with EtOAc (10 ml). Combine the organic layers and add MgSOFourDry over, filter and concentrate under vacuum. The residue was purified by preparative HPLC (C-18 column, 20-80% [0.1% AcCN solution in AcOH] in 0.1% aqueous AcOH) to give the title compound, N- [3- (cyclopropylmethyl). 72 mg of the AcOH salt of 2-[(4-ethoxyphenyl) methyl] -3H-imidazo [4,5-b] pyridin-6-yl] -N-methyl-thiophene sulfonamide (3- (cyclopropylmethyl)- 2-[(4-ethoxyphenyl) methyl] -N-methyl-3H-imidazo [4,5-b] pyridin-6-amine was obtained (18.0% yield).
1H-NMR (400 MHz, d3-MeOD): δ0.37 (m, 2H), 0.43 (m, 2H), 1.10 (m, 1H), 1.35 (t, J = 7.0 Hz, 3H), 3.32 (s , 3H), 3.99 (t, J = 7.0 Hz, 2H), 4.10 (d, J = 7.2 Hz, 2H), 4.32 (s, 2H), 6.86 (d, J = 8.8 Hz, 2H), 7.17 (d , J = 8.8 Hz, 2H), 7.20 (m, 1H), 7.44 (d, J = 5.3 Hz, 1H), 7.61 (d, J = 2.3 Hz, 1H), 7.85 (d, J = 5.1 Hz, 1H ), 8.15 (d, J = 2.3 Hz, 1H). MS (ESI) (M + H)+: 483.
[0261]
[Table 3]
Figure 2004528334
[0262]
[Table 4]
Figure 2004528334
[0263]
[Table 5]
Figure 2004528334
[0264]
Example 110
N- [1- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -1H-benzimidazol-5-yl] -N-methyl-1-piperidinecarboxamide
1- (Cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) methyl] -N-methyl-1H-benzimidazol-5-amine in MeCN (8 ml) (67.2 mg, 0.2 mmol, To a solution of DIPEA (51.7 mg, 0.4 mmol) and DMAP (5 mg) at room temperature was added piperidinecarbonyl chloride (44.3 mg, 0.3 mmol) to the solution prepared according to the procedure described in Example 51AA). . The reaction mixture was heated under reflux for 24 hours. , HTwoQuenched with O (50 ml) and extracted with EtOAc (4 × 20 ml). The combined organic layers were washed with an aqueous NaCl solution,TwoSOFourDried on top. After filtration and evaporation of the solvent, the residue was purified by MPLC using EtOAc on silica gel, converting 75.1 mg (84%) of the resulting colorless syrup to a white solid TFA salt.
1H-NMR (CDThreeOD): δ0.51 (m, 2H), 0.66 (m, 2H), 1.28 (m, 1H), 1.41 (m, 7H), 1.55 (m, 2H), 3.28 (s, 3H), 3.34 (m , 4H), 4.07 (q, J = 7.1 Hz, 2H), 4.39 (d, J = 7.2 Hz, 2H), 4.57 (s, 2H), 7.01 (m, 2H), 7.30 (m, 2H), 7.39 (dd, J = 9.0, 2.1 Hz, 1H), 7.44 (d, J = 2.0 Hz, 1H), 7.90 (d, J = 9.0 Hz, 1H). MS (ESI) (M + H)+= 447.36.
Analytical value (C27H34NFourOTwo+0.90 TFA + 0.60 HTwoO):
Calculated: C, 61.77; H, 6.50; N, 10.00.
Found: C, 61.90; H, 6.65; N, 9.79.
[0265]
Example 111
N- [1- (cyclopropylmethyl) -2-[(4-ethoxyphenyl) methyl] -1H-benzimidazol-5-yl] -N-methyl-1-pyrrolidinecarboxamide
1- (cyclopropylmethyl) -2- [1- (4-ethoxyphenyl) methyl] -N-methyl-1H-benzimidazol-5-amine in MeCN (8 ml) (67.2 mg, 0.2 mmol, To a solution of Example 51AA), DIPEA (51.7 mg, 0.4 mmol), and DMAP (5 mg) was added pyrrolidinecarbonyl chloride (40.1 mg, 0.3 mmol) at room temperature. . The reaction mixture was heated under reflux for 24 hours. HTwoQuenched with O (50 ml) and extracted with EtOAc (4 × 20 ml). The combined organic layers were washed with an aqueous NaCl solution,TwoSOFourDried on top. After filtration and evaporation of the solvent, the residue was purified by MPLC using EtOAc on silica gel, converting 79.4 mg (92%) of the resulting colorless syrup to a white solid TFA salt.
1H NMR (CDThreeOD): δ0.50 (m, 2H), 0.65 (m, 2H), 1.29 (m, 1H), 1.41 (t, J = 7.2 Hz, 3H), 1.75 (m, 4H), 3.28 (s, 3H) ), 3.34 (m, 4H), 4.07 (q, J = 7.0 Hz, 2H), 4.39 (d, J = 7.2 Hz, 2H), 4.58 (s, 2H), 7.01 (m, 2H), 7.31 (m , 2H), 7.43 (dd, J = 9.0, 2.1 Hz, 1H), 7.48 (m, 1H), 7.91 (d, J = 8.8 Hz, 1H). MS (ESI) (M + H)+= 433.34.
Analytical value (C26H32NFourOTwo+0.90 TFA + 0.20 HTwoO):
Calculated: C, 61.97; H, 6.23; N, 10.40.
Found: C, 62.01; H, 6.20; N, 10.04.

Claims (10)

下記式I:
Figure 2004528334
[式中、R1は −(C1−C8)アルキル、−(C2−C8)アルケニル、R4 2N(C1−C6)アルキル−、R4 2NC(=O)(C1−C6)アルキル−、R4O(C1−C6)アルキル−、R4OC(=O)(C1−C6)アルキル−、R4C(=O)(C1−C6)アルキル−、R4C(=O)NR4(C1−C6)アルキル−、R4 2NSO2(C1−C6)アルキル−、R4CSO2NR4(C1−C6)アルキル−、R4 2NC(=O)NR4(C1−C6)アルキル−、R4 2NSO2NR4(C1−C6)アルキル−、アリール(C1−C6)アルキル、アロイル(C1−C6)アルキル、ヘテロアリール(C1−C6)アルキル、ヘテロアロイル(C1−C6)アルキル、(C3−C8)ヘテロシクロアルキル(C1−C6)アルキル、2環式ヘテロアリール(C1−C6)アルキルおよび2環式ヘテロアロイル(C1−C6)アルキルよりなる群から選択され;
1部分は未置換の−(C2−C8)アルケニルおよび未置換であるかハロゲン、シアノ、アセトキシメチルおよびニトロよりなる群から独立して選択される部分1つまたはそれ以上で置換された−(C1−C8)アルキルを包含し;
Arは場合により置換されたアリール部分であり;
2は未置換であるかまたはフッ素置換基1またはそれ以上で1〜6個の炭素上で置換された−(C1−C6)アルキル、または、(C3−C6)シクロアルキルであり;
3は下記:
Figure 2004528334
よりなる群から選択され;
4は−H、−(C1−C6)アルキル、−(C2−C6)アルケニルおよび−(C2−C6)アルキニルよりなる群から独立して選択される部分であり;
5部分は−H、−(C1−C6)アルキル、−(C2−C6)アルケニルおよび−ヘテロサイクリルよりなる群から独立して選択され;
6部分は−H、−(C1−C6)アルキル、−(C2−C6)アルケニルおよび−(C1−C6)アルカノイル、ヘテロサイクリル、ヘテロサイクリル(C1−C3)アルキル、アリール、アリール(C1−C3)アルキル、ヘテロアリール、ヘテロアリール(C1−C3)アルキル、2環式ヘテロアリールおよび2環式ヘテロアリール(C1−C3)アルキル、よりなる群から独立して選択され;
5およびR6は一緒になって5〜7員の複素環を形成してよく;
Xは−C(R5)2−、−NR5−、C(=O)−、−CH2−CH2−、−CH=CH−、−O−、−C(R)(R')−および−S(O)n−(式中nは0、1または2)よりなる群から選択され、ただしRおよびR'は(C1−C6)アルキル、OR”またはHであり、そしてR”はHまたは(C1−C6)アルキルであり;そして、
Yは炭素または窒素であり、
ここでR1がR4 2N(C1−C6)アルキル−であり、ここで両方のR4が(C1−C6)アルキルである場合は、R3はアセチル、−NH2およびアセトアミドではない]の化合物または製薬上許容しうるその塩。
Formula I below:
Figure 2004528334
[In the formula, R 1 - (C 1 -C 8) alkyl, - (C 2 -C 8) alkenyl, R 4 2 N (C 1 -C 6) alkyl -, R 4 2 NC (= O) ( C 1 -C 6 ) alkyl-, R 4 O (C 1 -C 6 ) alkyl-, R 4 OC (CO) (C 1 -C 6 ) alkyl-, R 4 C (−O) (C 1- C 6) alkyl -, R 4 C (= O ) NR 4 (C 1 -C 6) alkyl -, R 4 2 NSO 2 ( C 1 -C 6) alkyl -, R 4 CSO 2 NR 4 (C 1 - C 6) alkyl -, R 4 2 NC (= O) NR 4 (C 1 -C 6) alkyl -, R 4 2 NSO 2 NR 4 (C 1 -C 6) alkyl -, aryl (C 1 -C 6 ) Alkyl, aroyl (C 1 -C 6 ) alkyl, heteroaryl (C 1 -C 6 ) alkyl, heteroaroyl (C 1 -C 6 ) alkyl, (C 3 -C 8 ) heterocycloalkyl (C 1 -C 6) ) Alkyl, bicyclic Selected from the group consisting of heteroaryl (C 1 -C 6 ) alkyl and bicyclic heteroaroyl (C 1 -C 6 ) alkyl;
R 1 moiety is unsubstituted - substituted with (C 2 -C 8) alkenyl and unsubstituted or substituted with halogen, cyano, part one or more independently selected from the group consisting of acetoxymethyl and nitro - (C 1 -C 8) encompasses alkyl;
Ar is an optionally substituted aryl moiety;
R 2 is substituted on 1-6 carbons by one or fluorine substituent 1 or more unsubstituted - (C 1 -C 6) alkyl, or, with (C 3 -C 6) cycloalkyl Yes;
R 3 is:
Figure 2004528334
Selected from the group consisting of:
R 4 is -H, - (C 1 -C 6 ) alkyl, - (C 2 -C 6) alkenyl and - (C 2 -C 6) a moiety independently selected from the group consisting of alkynyl;
R 5 moiety is -H, - (C 1 -C 6 ) alkyl, - (C 2 -C 6) alkenyl and - are independently selected from the group consisting of heterocyclyl;
R 6 moiety is -H, - (C 1 -C 6) alkyl, - (C 2 -C 6) alkenyl and - (C 1 -C 6) alkanoyl, heterocyclyl, heterocyclyl (C 1 -C 3 ) alkyl, aryl, aryl (C 1 -C 3) alkyl, heteroaryl, heteroaryl (C 1 -C 3) alkyl, bicyclic heteroaryl and bicyclic heteroaryl (C 1 -C 3) alkyl, more Independently selected from the group consisting of:
R 5 and R 6 may form a heterocyclic ring of 5- to 7-membered together;
X is -C (R 5) 2 -, - NR 5 -, C (= O) -, - CH 2 -CH 2 -, - CH = CH -, - O -, - C (R) (R ') And -S (O) n- , wherein n is 0, 1 or 2 wherein R and R ′ are (C 1 -C 6 ) alkyl, OR ″ or H; R "is H or (C 1 -C 6) alkyl; and,
Y is carbon or nitrogen;
Wherein R 1 is R 4 2 N (C 1 -C 6) alkyl -, where if both R 4 is (C 1 -C 6) alkyl, R 3 is acetyl, -NH 2 and Not acetamido] or a pharmaceutically acceptable salt thereof.
式I中、R1が−(C1−C8)アルキル、−(C2−C8)アルケニル、アリール(C1−C6)アルキル、R4 2N(C1−C6)アルキル−、R4O(C1−C6)アルキル−、−ヘテロシクロアルキル(C1−C6)アルキル(ただしヘテロサイクリルは窒素および酸素から選択されるヘテロ原子1個またはそれ以上を含む4〜8員の環である)およびヘテロアリール(C1−C6)アルキルよりなる群から選択され;
ここでアリールおよびヘテロアリールのR1部分は未置換であるか、または−(C1−C6)アルキルまたはハロゲンで置換されており;
2は−CH3、−CH2CH3、−CH(CH3)2およびCF3よりなる群から選択され;
3は下記:
Figure 2004528334
よりなる群から選択され;
Arはアリール部分であり;未置換であるか、(C1−C6)アルキル、ハロゲン、トリフルオロメチル、シアノ、ニトロ、ヒドロキシおよび−OR4よりなる群から独立して選択される部分1つまたはそれ以上で置換されており;
Xは−CH2−、−CH(CH3)−、−C(CH3)2−、−CH(OH)−、−NH−、−N(CH3)−、−CH2CH2−、−C(=O)−、−S−および−O−よりなる群から選択され;
Arがフェニルまたは6員の複素芳香族環系である場合、Xは環Ar上で−O−R2基に関して1,4の位置関係にあり;
Arが5員の複素芳香族環系である場合、Xは環Ar上で−O−R2基に関して1,3の位置関係にあり;
4は−Hおよび−(C1−C6)アルキルよりなる群から独立して選択され;
5は−H、−(C1−C6)アルキルおよび−(C2−C6)アルケニルよりなる群から独立して選択され;そして、
6は−H、−(C1−C6)アルキル、−(C2−C6)アルケニルおよびヘテロアリールよりなる群から独立して選択され;
ここで該ヘテロアリールは未置換であるか、または−(C1−C6)アルキルにより置換されている、請求項1記載の化合物。
Wherein I, R 1 is - (C 1 -C 8) alkyl, - (C 2 -C 8) alkenyl, aryl (C 1 -C 6) alkyl, R 4 2 N (C 1 -C 6) alkyl - , R 4 O (C 1 -C 6) alkyl -, - heterocycloalkyl (C 1 -C 6) alkyl (wherein the heterocyclyl 4 containing heteroatoms one or more selected from nitrogen and oxygen An 8-membered ring) and heteroaryl (C 1 -C 6 ) alkyl;
Wherein the R 1 portion of aryl and heteroaryl is unsubstituted or substituted with-(C 1 -C 6 ) alkyl or halogen;
R 2 is -CH 3, -CH 2 CH 3, is selected from the group consisting of -CH (CH 3) 2 and CF 3;
R 3 is:
Figure 2004528334
Selected from the group consisting of:
Ar is aryl moiety; or an unsubstituted, one portion 1 is independently selected from (C 1 -C 6) alkyl, halogen, trifluoromethyl, cyano, nitro, hydroxy, and the group consisting of -OR 4 Or more substituted;
X is -CH 2 -, - CH (CH 3) -, - C (CH 3) 2 -, - CH (OH) -, - NH -, - N (CH 3) -, - CH 2 CH 2 -, Selected from the group consisting of -C (= O)-, -S- and -O-;
When Ar is a heteroaromatic ring system phenyl or 6-membered, X is in the position relationship of the 1,4 regard -O-R 2 group on a ring Ar;
When Ar is a 5-membered heteroaromatic ring system, X is in the position relationship of the 1,3 regard -O-R 2 group on a ring Ar;
R 4 is -H and - the selected (C 1 -C 6) independently from the group consisting of alkyl;
R 5 is -H, - (C 1 -C 6 ) alkyl and - (C 2 -C 6) are independently selected from the group consisting of alkenyl; and,
R 6 is -H, - (C 1 -C 6 ) alkyl, - (C 2 -C 6) are independently selected from alkenyl, and the group consisting of heteroaryl;
Wherein the heteroaryl or aryl is unsubstituted, or - (C 1 -C 6) substituted by an alkyl, a compound according to claim 1.
式I中、R1がシクロプロピルメチル、エチル、プロピル、アリル、イソペンチル、ベンジル、メトキシエチル、ジメチルアミノエチル、4−ピリジルメチル、2−ピリジルメチル、1−ピロリルエチル、1−モルホリノエチル、5−(2−メチルチアゾリル)、シクロヘキシルメチル、2−ピロリジルメチル、N−メチル−2−ピロリジルメチル、2−ピペリジルメチル、N−メチル−2−ピペリジルメチル、3−チエニルメチル、2−テトラヒドロフラニルメチル、(2−ニトロチオフェン−5−イル)メチル、(1−メチル−1H−イミダゾール−2−イル)メチル、(5−(アセトキシメチル)−2−フラニル)メチル、(2,3−ジヒドロ−1H−イソインドール−1−イル)メチルおよび5−(2−メチルチアゾリル)よりなる群から選択され;
2は−CH3、−CH2CH3、−CH(CH3)2およびCF3よりなる群から選択され;
4は−(C1−C6)アルキルであり;
5は−H、−CH3、−CH2CH3、−CH=CH2および−CH2−CH=CH2よりなる群から選択され;そして、
6は−CH3、−CH2CH3、−CH=CH2、−CH2−CH=CH2、−CH2−CH2−CH=CH2、−CH2CH(CH3)2および5−メチル−3−イソキサゾールよりなる群から選択され;
Arはフェニルまたは6員の複素芳香族環系であり、その何れも未置換であるか、(C1−C6)アルキル、ハロゲン、トリフルオロメチル、シアノ、ニトロ、ヒドロキシおよび−OR4よりなる群から独立して選択される部分1つまたはそれ以上で置換されており;
Xは−CH2−、−CH2CH2−、−S−、−O−、−CH(CH3)−、−C(CH3)2−、−CH(OH)−、−NH−、−N(CH3)−および−C(=O)−よりなる群から選択され;そして、
Xは環Ar上で−O−R2基に関して1,4の位置関係にある、請求項1記載の化合物。
In the formula I, R 1 is cyclopropylmethyl, ethyl, propyl, allyl, isopentyl, benzyl, methoxyethyl, dimethylaminoethyl, 4-pyridylmethyl, 2-pyridylmethyl, 1-pyrrolylethyl, 1-morpholinoethyl, 5- ( 2-methylthiazolyl), cyclohexylmethyl, 2-pyrrolidylmethyl, N-methyl-2-pyrrolidylmethyl, 2-piperidylmethyl, N-methyl-2-piperidylmethyl, 3-thienylmethyl, 2-tetrahydrofuranylmethyl, ( 2-nitrothiophen-5-yl) methyl, (1-methyl-1H-imidazol-2-yl) methyl, (5- (acetoxymethyl) -2-furanyl) methyl, (2,3-dihydro-1H-iso Selected from the group consisting of indole-1-yl) methyl and 5- (2-methylthiazolyl)
R 2 is -CH 3, -CH 2 CH 3, is selected from the group consisting of -CH (CH 3) 2 and CF 3;
R 4 is - (C 1 -C 6) alkyl;
R 5 is -H, -CH 3, -CH 2 CH 3, is selected from the group consisting of -CH = CH 2 and -CH 2 -CH = CH 2; and,
R 6 is -CH 3, -CH 2 CH 3, -CH = CH 2, -CH 2 -CH = CH 2, -CH 2 -CH 2 -CH = CH 2, -CH 2 CH (CH 3) 2 and Selected from the group consisting of 5-methyl-3-isoxazole;
Ar is an heteroaromatic ring system phenyl or 6-membered, that either may be unsubstituted, consisting of (C 1 -C 6) alkyl, halogen, trifluoromethyl, cyano, nitro, hydroxy and -OR 4 Substituted with one or more moieties independently selected from the group;
X is -CH 2 -, - CH 2 CH 2 -, - S -, - O -, - CH (CH 3) -, - C (CH 3) 2 -, - CH (OH) -, - NH-, Selected from the group consisting of —N (CH 3 ) — and —C (= O) —; and
X is a positional relationship of the 1,4 regard -O-R 2 group on ring Ar, a compound according to claim 1.
式I中、R2が−CH2CH3であり;
Arは未置換のフェニルまたはピリジルであり;
Xは−CH2−、−CH2CH2−、−S−、−CH(CH3)−、−C(CH3)2−、−CH(OH)−、−NH−、−N(CH3)−および−O−よりなる群から選択され;
Xは環Ar上で−O−R2基に関して1,4の位置関係にあり;そして、
4はメチルである、請求項1記載の化合物。
In formula I, R 2 is —CH 2 CH 3 ;
Ar is unsubstituted phenyl or pyridyl;
X is -CH 2 -, - CH 2 CH 2 -, - S -, - CH (CH 3) -, - C (CH 3) 2 -, - CH (OH) -, - NH -, - N (CH 3 ) selected from the group consisting of-and -O-;
X is in a positional relationship between 1,4 regard -O-R 2 group on a ring Ar; and,
R 4 is methyl, compound of claim 1.
治療に使用するための請求項1〜4の何れか1項に記載の式Iの化合物。5. A compound of formula I according to any one of claims 1 to 4 for use in therapy. 治療が疼痛処理である請求項5記載の化合物。The compound according to claim 5, wherein the treatment is pain treatment. 疼痛の治療用医薬の製造のための請求項1記載の化合物の使用。Use of a compound according to claim 1 for the manufacture of a medicament for the treatment of pain. 製薬上許容しうる担体とともに活性成分として請求項1記載の化合物を含有する医薬組成物。A pharmaceutical composition comprising a compound according to claim 1 as an active ingredient together with a pharmaceutically acceptable carrier. 請求項1記載の式Iの化合物の治療有効量を治療の必要な温血動物に投与することを包含する該動物における疼痛の治療のための方法。A method for treating pain in a warm-blooded animal in need thereof, comprising administering a therapeutically effective amount of a compound of formula I according to claim 1 to the animal. 水素の存在下で、パラジウム触媒で溶媒中の化合物の溶液を処理することを包含する、化合物のフェニルまたはピリジル環上のアミノ置換基に対してパラ位にあるニトロ部分の存在下において化合物のフェニルまたはピリジル環上のアミノ置換基に対してオルト位のニトロ部分を選択的に還元するための方法。Phenyl of the compound in the presence of a nitro moiety para to the amino substituent on the phenyl or pyridyl ring of the compound, comprising treating the solution of the compound in a solvent with a palladium catalyst in the presence of hydrogen. Or a method for selectively reducing the nitro moiety ortho to the amino substituent on the pyridyl ring.
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JP2014520886A (en) * 2011-07-18 2014-08-25 メルク パテント ゲゼルシャフト ミット ベシュレンクテル ハフツング Benzamides

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